NIDEK
AUTO REF/KERATOMETER
Model ARK-700A
OPERATOR’S MANUAL
* Specifications are subject to change without notice for improvement.
NIDEK CO., LTD.
(Manufacturer)
NIDEK CO., LTD
(Tokyo Office)
NIDEK INCORPORATED
(United States Agent)
NIDEK SOCIETE ANONYME
(Authorized Representative)
: 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan
Telephone: (0533) 67-6611
Facsimile: (0533) 67-6610
: 6th Floor, Takahashi Bldg., No.2, 3-chome, Kanda-jinboucho
Chiyoda-ku, Tokyo 101-0051, Japan
Telephone: (03) 3288-0571
Facsimile: (03) 3288-0570
Telex: 2226647 NIDEK J
: 47651 Westinghouse Drive Fremont, California 94539, U. S. A.
Telephone: (510) 226-5700
Facsimile: (510) 226-5750
: Europarc 13, rue Auguste Perret, 94042 CRETEIL, France
Telephone: (01) 49 80 97 97
Facsimile: (01) 49 80 32 08
2003. 2
32159-P902P
Printed in JAPAN
BEFORE USE OR MAINTENANCE, READ THIS MANUAL.
This Operator’s Manual contains information necessary for operation of the
NIDEK AUTO REF/KERATOMETER Model ARK-700A.
This manual provides information on operating procedures, cautions for safety,
specifications, accessories, and maintenance suggestions. The instrument complies
with ISO 10342 (Ophthalmic instruments - Eye Refractometers). IEC 60601-1 and
UL2601-1 standards are applied in this manual. The dioptric powers are indicated with
reference wavelength λd = 587.56 nm. This manual is necessary for correct use.
Especially, cautions for safety and operating procedures must be thoroughly understood
before using the instrument. Be sure to keep this manual together with the instrument
and read it whenever needed.
There are no user-serviceable parts inside the instrument except a printer paper and
fuses. Therefore, if you find any problems or have questions about the instrument
during operation, please contact your authorized distributor.
MEDICAL ELECTRICAL EQUIPMENT
34VK
UL2601-1
CAN/CSA C22.2 NO. 601.1
WITH RESPECT TO ELECTRICAL SHOCK, FIRE AND
MECHANICAL HAZARDS ONLY IN ACCORDANCE WITH
UL260l-1 AND CAN/CSA C22.2 NO. 601.1
(This applies only to the equipments whose power source is 100/120Vac.)
Table of Contents
§1 INTRODUCTION ........................................................................................................Page
1-1
1.1 Outline of the Product .............................................................................................. 1-1
1.2 Classification ............................................................................................................ 1-1
1.3 Symbol Information ................................................................................................. 1-2
§2 SAFETY ........................................................................................................................ 2-1
2.1 Operation .................................................................................................................. 2-1
2.2 Storage ...................................................................................................................... 2-2
2.3 Placement ................................................................................................................. 2-2
2.4 Installation ................................................................................................................ 2-3
2.5 Wiring ....................................................................................................................... 2-4
2.6 After Use .................................................................................................................. 2-5
2.7 Maintenance and Checks .......................................................................................... 2-5
2.8 Disposal .................................................................................................................... 2-6
2.9 Labels ....................................................................................................................... 2-7
§3 CONFIGURATION ..................................................................................................... 3-1
§4 OPERATING PROCEDURES ................................................................................... 4-1
4.1 Operation Flow ......................................................................................................... 4-1
4.2 Preparation for Measurement ................................................................................... 4-1
4.3 AR (Refractive Power), KM (Corneal Curvature) Measurements ........................... 4-8
4.4 CS (Corneal Size) Measurement ............................................................................ 4-16
4.5 PS (Pupil Size) Measurement ................................................................................. 4-18
4.6 PD (Pupil Distance) Measurement ......................................................................... 4-20
4.7 Measuring Sagittal Radius ..................................................................................... 4-22
§5 PRINT OUT .................................................................................................................. 5-1
5.1 Printing Measurement Results ................................................................................. 5-1
5.2 Eyeprint .................................................................................................................... 5-5
§6 OTHER FUNCTIONS ................................................................................................. 6-1
6.1 System Setups .......................................................................................................... 6-1
6.2 Setting Date and Time .............................................................................................. 6-9
6.3 Entering Comments ................................................................................................ 6-10
6.4 Measuring Hard Contact Lenses ............................................................................ 6-13
§7 TROUBLESHOOTING GUIDE ................................................................................ Page
7-1
§8 MAINTENANCE ......................................................................................................... 8-1
8.1 Replacing Printer Roll .............................................................................................. 8-1
8.2 Fixing a Bunch of Chin Rest Paper .......................................................................... 8-3
8.3 Replacing Fuses........................................................................................................ 8-4
8.4 Cleaning the Measuring Window ............................................................................. 8-6
8.5 Cleaning Exterior ..................................................................................................... 8-7
8.6 List of Parts for Replacement ................................................................................... 8-7
§9 IC CARD SYSTEM (OPTIONAL) ............................................................................ 9-1
§10 SPECIFICATIONS .................................................................................................... 10-1
§11 ACCESSORIES .......................................................................................................... 11-1
11.1 Standard Accessories ............................................................................................ 11-1
11.2 Optional Accessories ............................................................................................ 11-1
A. Glossary ........................................................................................................................... A-1
B. Index ................................................................................................................................ B-1
[This page is intentionally left blank.]
§1
INTRODUCTION
1.1 Outline of the Product
This instrument is an auto ref/keratometer which contains both a refractometer and a keratometer
in one unit. The refractometer objectively measures the refractive power of the patient’s eyes
with infrared rays to obtain spherical, cylindrical powers and cylinder axis of the lens which may
correct the patient’s vision into emmetropia. The keratometer measures the corneal curvature
(corneal refractive power), angle of corneal meridian, and corneal cylindrical power.
This instrument has a main body and a measuring unit integrated on one base. On the base is a
chin rest on the patient’s side and a printer on the operator’s side which makes an output of
measurement results. On the main body is a TV monitor, a control panel, and a joystick, which
are used to make alignments or manipulation. The measuring unit has a measuring window,
where the patient looks into and where the infrared ray radiates on the patient’s eye. Also, there
is an auto-tracking mechanism which moves the measuring unit to follow eye movement, and an
auto-shot function, which makes serial measurement start automatically when the instrument
becomes correctly focused.
1.2 Classification
[Classification under the provision of 93/42/EEC (MDD)] Class
ARK-700A is classified into Class a system.
a
[Protection method against electric shock] Class
The ARK-700A is classified as a class instrument.
The class instrument is an instrument in which protection against electrical shock does not
rely on basic insulation only, but which includes an additional safety precaution that provides
for a connection of accessible conductive parts to the protective (earth) conductor in the fixed
wiring of the installation. Therefore; accessible conductive parts cannot become activated in
the event of failure in the basic insulation.
Use the power outlet which is equipped with a ground terminal.
[Degree of protection against electrical shock] Type B Applied Part
ARK-700A is provided with a Type B Applied Part.
The Type B Applied Part provides an adequate degree of protection against electrical shock,
particularly regarding the following:
- allowable leakage currents
- reliability of the protective earth ground connection (If applicable)
[Degree of protection against ingress of liquids] IP20
ARK-700A is classified as IP20.*1
ARK-700A is a normal instrument, which is provided with an enclosure not completely
waterproof. Avoid splashing water on the instrument.
*1 In accordance with IEC 60529
1-2
[Degree of protection against flammability]
The ARK-700A is classified as an instrument not suitable to be used in a potentially flammable
environment.
Do not use near flammable materials.
[Method(s) of sterilization or disinfection recommended by manufacturer]
It is possible to wipe the forehead rest and chin rest with a cloth dampened with alcohol as
necessary.
[Mode of operation]
Classification of ARK-700A: Continuous operation
1.3 Symbol Information
This symbol on the body indicates that caution should be taken. Refer to the operator’s
manual before use.
This indicates that the degree of protection against electrical shock of the applied part is
classified as a Type B Applied Part.
This symbol on the power switch indicates the power is ON.
This symbol on the power switch indicates the power is OFF.
Fuse rating.
This indicates the interface connector for LENSMETER.
This indicates the interface connector for an external computer.
This indicates that the instrument must be supplied only with alternating current.
This indicates the knob for adjusting contrast.
This indicates the knob for adjusting brightness.
§2
SAFETY
In this manual, a Signal Word is used to designate a degree or level of safety alerting,
whose definitions are as follows.
CAUTION: Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury or property damage.
Even the cases mentioned in
CAUTION may result in serious injury under a
certain situation. Be sure to observe the instructions of
CAUTION.
2.1 Operation
CAUTION
• Never disassemble or touch the inside of the instrument.
This may result in an electric shock or instrument malfunction.
• Never yank the power cord to disconnect from receptacles but hold the plug.
This can weaken the metal core of the cord and may result in a short circuit or electric
shock.
• Never put a heavy object on the power cord nor catch the cord between any objects.
This can weaken the metal core of the cord and may result in a fire or electric shock.
• If the metal core of the power cord is exposed, power turns on and off by shaking the cord,
or cord/plug gets so heated that one cannot hold it, it means that the cord is damaged.
Immediately replace the cord.
This may cause an electric shock or a fire.
• Do not use the instrument for other than the intended purpose.
NIDEK will not be responsible for accidents or malfunction caused by carelessness.
• Wipe between the prongs of mains plug with a dry cloth every once in a while.
If a dust settles between the prongs, the dust easily takes up moisture, and the damp
dust may cause short circuit and a fire.
• The measured values of objective refractive power obtained by the ARK-700A are intended
to be used as a reference of lens prescription for the correction of visual acuity with
spectacle or contact lenses. Manifest refraction must be used as the basis for spectacle or
contact lens prescription.
2-2
CAUTION
• In advance of a measurement of each patient, wipe the forehead rest and chin rest with a
clean cloth.
Moreover, remove one chin rest paper for each patient if the bunch of the chin rest
paper is fixed on the chin rest. If necessary, wipe the forehead rest and chin rest using
a cloth dampened with rubbing alcohol.
• In the event of a malfunction, do not touch the inside of the instrument, but remove the
power cord and contact your authorized distributor.
• Keep fingerprints and dust away from the measuring window.
Reliability of the measured data may be lowered substantially.
2.2 Storage
CAUTION
• Do not store the instrument in a place where it may get wet or where poisonous gas or
liquid is stored.
• Avoid storing the instrument in an area with excessive heat, humidity, or dust.
To preserve the appearance or internal parts of the instrument, avoid direct
exposure to sunlight.
2.3 Placement
CAUTION
• Do not drag the instrument by its cord or cable.
This may cause possible injury or instrument damage.
• To carry the instrument, hold it from the side with both your hands on its base. (Do not
ever hold the forehead rest to lift up the instrument.)
This may result in possible injury or instrument damage.
2-3
CAUTION
• To transfer the instrument to another location, store the instrument in a shipping carton or
optional carrying case to carry. In such cases, never lock the main body with the locking
knob.
Breakdown of the instrument may result.
2.4 Installation
CAUTION
• Before connecting the power cord or interface cable, provide a stable, level, and open
space.
Since receptacles are under the base unit, the instrument may stumble down and may
cause injury or instrument malfunction.
• Do not install the instrument near water.
If water gets into the internal structure, there is the possibility of an electric shock or
instrument malfunction.
• Install the instrument in a stable and level place where vibration or shock does not occur.
The instrument may not perform measurement correctly or may malfunction.
Also, if the instrument is tripped over because of any accidental shock, it may result in
possible injury.
• Install the instrument in the following conditions.
A low dust environment
A low light interference environment
A vibration and shock free environment
• Install the instrument in the environment whose condition can be maintained under
the follows. Use the instrument under the following temperature and humidity.
Use environment Temperature:
10 - 40 ºC
Humidity:
30 - 75% (Non-condensing)
2-4
CAUTION
• This instrument has been tested and found to comply with the limits for medical devices
to the IEC 60601-1-2: 1993, EN 60601-1-2: 1994, Medical Device Directive 93/42/EEC.
These limits are designed to provide reasonable protection against harmful interference
in a typical medical installation. This instrument generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to other devices in the vicinity. However, there is no guarantee
that interference will not occur in a particular installation. If this instrument does cause
harmful interference to other devices, which can be determined by turning the instrument
off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
- Reorient or relocate the receiving device.
- Increase the separation between the instrument.
- Connect the instrument into an outlet on a circuit different from that to which the
other device (s) are connected.
- Consult the manufacturer or field service technician for help.
2.5 Wiring
CAUTION
• Be sure to use a (HOSPITAL GRADE) wall outlet equipped with a grounding terminal in
order to avoid an electric shock or fire in the event of a power leak.
• Be sure to use the power outlet which meets the requirements of power specification.
If the line voltage is too high or too low, the instrument may not give full performance.
Malfunction or a fire may also occur.
• Insert a mains plug into a grounded outlet.
Electric shock or fire may result in case of breakdown of the instrument or power leaks.
• Securely connect the mains plug into an outlet.
Insecure connection may result in a fire.
2-5
2.6 After Use
CAUTION
• If the instrument is not to be used for a long time, disconnect the power cord from
the wall outlet.
This may cause a fire.
• When the instrument is not in use, turn off the power switch and place the cover
over the machine.
If the instrument is not covered, dust may affect the measurement accuracy.
2.7 Maintenance and Checks
CAUTION
• Replace the fuses with the specified fuses only.
A fire may result.
• Disassembling for service is not permitted except at NIDEK or authorized distributor.
• Be careful not to leave fingerprints or dust on the measuring window.
This will substantially lower the reliability of the measurement results.
• Never use an organic solvent such as paint thinner to wipe the exterior.
This may ruin the surface.
• When the instrument is sent back to NIDEK for repair or maintenance, wipe the surface
(especially, the area where the patient’s skin contacts) of the instrument with a clean cloth
immersed in ethyl alcohol for disinfection.
• Contact NIDEK or your authorized distributor to check whether the instrument needs
measurement accuracy calibration if the AR-measured results are largely different from
the subjective measurements.
2-6
2.8 Disposal
CAUTION
• Follow local governing ordinances and recycling plans regarding disposal or recycling of
device components.
Especially the disposing method of lithium batteries varies according to the government.
As rechargeable lithium battery is used in the instrument, follow the local governing
ordinates and recycling plans when disposing a board with lithium batteries.
• When disposing packing sort them by the materials and follow local governing ordinances
and recycling plans.
2-7
2.9 Labels
The following labels provide safety information about each part.
or
(Only marketing for NIDEK INCORPORATED)
or
or
§3
CONFIGURATION
If optionally ordered:
IC Card System
TV Monitor
Display Panel
Cover for Switches
R/K Button
Locking Knob
IOL Button
Power Switch
Auto-shot Button
UP Button
Auto-tracking Button
DOWN Button
Printer
3-2
IC Card System (Optional)
If the optional IC card system has been ordered, the IC card Reader/Writer should have
been factory-built in this part.
TV Monitor
Displays the patient’s eye, Target, Focusing
indicator, KM (Corneal curvature) measurement, measuring count, Mire ring projected
on the patient’s eye, etc.
Display Panel
Displays AR (refractive power), CS, (corneal
size), PS (pupil size), and PD (pupil distance)
measurements. The indicators of R (right) or
L (left) shows the measuring eye side as well
as the eye side of the measurement result on
the display.
Cover for Switches
Inside, there are two switches for setting measurement conditions, a switch for printing
“Eyeprint”, and also knobs for adjusting contrast and brightness of the TV monitor display.
Locking Knob
Used to fix the main body to the base unit.
To lock the main body, bring the main body
to the center of the base unit, and turn the knob
counterclockwise while pressing it down. To
temporarily lock the body at any position, turn
the knob clockwise.
Do not lock the main body with this locking
knob during transport. Otherwise, breakdown
of the instrument may result.
Used during CS and PS measurements to
move the guide lines on the TV monitor.
Changes between on/off of the auto-tracking
function. When the auto-tracking function is
on, the instrument automatically controls the
up, down, right, and left movement of the
measuring part to adjust the alignment.
Used during CS and PS measurements to
move the guide lines on the TV monitor.
Changes between on/off of the auto-shot function. It is available only when the auto-tracking function is on. When the auto-shot function is on, the instrument automatically starts
serial measurement as soon as the instrument
is best aligned and in the best focus.
Should be pressed to turn on IOL mode when
measuring an IOL-implanted eye or an eye
with a Contact Lens (CL) on. If such eye is
measured without turning on the IOL mode,
an error may appear and measurement may
not be completed. Also, used for system parameter and date & time settings.
Used to change modes to select whether to
preform AR and KM measurements in succession or separately. The mode changes in
the order of R/K mode (AR and KM in succession),→ R mode (AR measurement),→ K
mode (KM measurement),→ RK mode... .
3-3
Start Button
Joystick
Memory Indicator
Print Button
Changing Button
3-4
Used to change from AR/KM measurements
to CS/PS/PD measurements.
By pressing this button measurement mode
changes in the order of CS,→ PS,→ Manual
PD,→ CS... .
Also, used to change system parameter settings, date & time settings, and character code
of comments. (To change back from CS/PS/
PD measurements to AR/KM measurements,
press
.)
Prints the measurement results if pressed after measurement.
Memory Indicator
While the measurement result is in memory,
this will be illuminated. It goes out when the
result is printed out and the next measurement
has begun.
Joystick
Used to move the main body right, left, back
and forth. By turning this, the main body can
be moved up and down.
Start Button
Used to start the AR/KM or PD measurement.
Also used to change the item number of system parameters.
3-5
Auto-tracking ON Mark
Auto-shot ON Mark
Mire Ring
Cylinder Mode Indication
Focusing Indicator
Measuring Count
Indication
Target
Min. Pupil Mark
Contrast Control
Brightness Control
Setting Switch
Eyeprint Switch
CYL Mode switch
Auxiliary Switches
3-6
Auto-tracking ON Mark
Shows that auto-tracking function is active.
Auto-shot ON Mark
Shows that the auto-shot function is active.
Mire Ring
Should be in focus at measurement. With this
ring projected on the cornea, it is possible to
observe the corneal shape. When auto-tracking function is on, you may move this ring
close to the target so that the instrument automatically begins alignment (controls the up,
down, right, and left movement of the main
body to make the ring concentric with the target). When the function is off, you should
manually place the ring concentric with the
target.
Cylinder Mode Indication
Indicates the current cylinder mode.
Focusing Indicator
When the auto-shot function is on, indicates
the focusing condition (distance between the
measuring unit and the patient’s eye).
Target
Used during AR/KM measurement as a guide
to place the patient’s eye in the center of the
TV monitor.
Min. Pupil Mark
Indicates the minimum pupil size measurable.
The instrument may not perform measurement when the measuring eye is smaller than
this mark or eyelash is on this mark.
Contrast Control
Used to adjust the contrast of the TV monitor.
Brightness Control
Used to adjust the brightness of the TV monitor.
Used when setting system parameters, setting
date and time, and writing comments.
Prints only the basic result and an Eyeprint,
which graphically tells the refractive status
of the eye, by pressing it after measurement.
The eyeprint will be printed out regardless of
the settings in system parameter. Also, used
to select one of parameter setting modes or
date & time setting mode.
Changes the cylinder mode, the reading direction of cylinder data.
+ mode ....... Cylinder data will be indicated
by + reading.
- mode ........ Cylinder data will be indicated
by - reading.
MIX mode .. Cylinder data will be indicated
by + reading when the refractive
power is positive for any axis
angle. In other cases, cyl. data
will be indicated by - reading.
· The cylinder mode can be changed even after measurement.
· Data will be printed out with the mode status at the time of the printout.
3-7
Forehead Rest
Measuring Window
Eye Level Marker
LED for Corneal Illumination
Chin Rest
PD Window
Chin Rest Knob
From-the-top view
H Control of TV Monitor
Underside View
V Control of TV Monitor
Fuses
Power Inlet
Interface Connectors
3-8
Measuring Window
Patient looks at the chart through this window.
Eye Level Marker
A guide for the patient’s eye level for measurement. The height of the chin rest should
be so adjusted that the center level of the
patient’s eye almost aligns with this line.
Chin Rest Knob
Turning this knob moves the chin rest up and
down. You may use the eye level marker as a
guide to adjust patient’s eye level to the comfortable height for measurement.
Fuses
Be sure to use the specified ones.
Power Inlet
The attached power cord is to be connected
here.
Interface Connectors*1
side :
Connect the interface cable to transfer measured results to an external computer.
side :
Connect the interface cable from the
lensmeter to import measured results from the
lensmeter. If the ARK-700A is equipped with
an IC card system, the connector on
side
can not be used.
By connecting the Lensmeter to
side of
the interface connectors and the refractor RT2100/RT-1200 to
side, the LM
(Lensmeter) data can be transmitted to the refractor via the ARK.*2 By pressing the print
button on the Lensmeter, the data transmission will be started.
V Control of TV Monitor
Adjusted with a screwdriver when the display
does not lock vertically. Can be found under
the main body.
H Control of TV Monitor
Adjusted with a screwdriver when the display
does not lock horizontally. Can be found under the main body.
*1 Accessory equipment connected to the analog and digital interfaces must be certified according
to the representative appropriate national standards (for example, UL 1950 for Data Processing
Equipment UL 2601-1 for Medical Equipment, and CSA C22.2 No. 601-1, EN 60601-1 and
IEC 60601-1.) Further more all configurations shall comply with the system standard IEC
60601-1. Everybody who connects additional equipment to the signal input part or signal
output part configured a medical system, and is therefore responsible that the system complies
with the requirements of the system standard IEC 60601-1. If in doubt, consult the technical
service department or your local representative.
*2 When communicating with the Lensmeter, set communication parameters for each instrument
as follows. For the setting procedure, see the Operator’s Manual of each instrument.
• ARK-700A
• NIDEK Lensmeter
33: Baud Rate = 9600
RS-232C = NIDEK
34: Bit Length = 8
Baud Rate = 9600
Parity = Odd
Data Bits = 8
Stop Bits = 1
§4
OPERATING PROCEDURES
4.1 Operational Flow
Power ON
4.2 Preparation for Measurement
(p. 4-1)
Measurements
→ 4.3 AR (Refractive Power), KM (Corneal Curvature) Measurements (p. 4-8)
→ A. When using the auto-tracking function (p. 4-8)
→ B. When not using the auto-tracking function (p. 4-12)
→ 4.4 CS (Corneal Size) Measurement (p. 4-16)
→ 4.5 PS (Pupil Size) Measurement (p. 4.18)
→ 4.6 PD (Pupil Distance) Measurement (p. 4-20)
→ 4.7 Measuring Sagittal Radius (p. 4-22)
5. PRINT OUT
(p. 5-1)
Power OFF
(Determine final prescription by subjective refraction.)
4.2 Preparation for Measurement
Auto-tracking
ON Mark
1. Turn ON the power switch.
The display panel indicates as shown below.
On the TV monitor, you will see the target,
focusing indicator and Min. Pupil Mark in the
center, Auto-tracking ON mark, and Auto-shot
ON mark on the top center, Cylinder mode
indication on the top right, and Measuring
mode, Measuring count, and KM measurements
on the bottom left.
Auto-shot
ON Mark
Min. Pupil Mark
Target
Focusing Indicator
4-2
When turning the power ON, the main body makes small right/left movements in order to
determine the initial setting position for the auto-tracking. This does not mean that the
instrument has been broken.
NOTE
• If “< PD ERR >” message is on the left of
the TV monitor, the instrument may not
recognize the left and right (measurement
may not be performed binocularly), and
also PD (pupil distance) may not be
measured. Check the PD window. If the
PD window is covered by anything,
remove it. If covered by dust, wipe lightly
with a swab with little alcohol to clean it.
If “<PD ERR>” message is indicated on
the monitor even after performing the
corrections described above, install the
instrument in a low light interference
environment since the error may occur
due to the light interference.
NOTE
• “Err” appears on the TV monitor if the power switch is turned ON on condition that
the printer paper is not set.
To correct the condition, turn on the power switch again after setting the printer paper
roll into the printer housing. (See “8.1 Replacing Printer Roll”)
2. Open the cover for switches and set
measurement conditions, etc.
The cover can be opened by sliding it to the
left.
a. Using
:
Perform system setups. As to the procedure,
see “6. OTHER FUNCTIONS”.
b. Using
:
Set the cylinder mode, indication of cylinder reading direction.
CYL +.......Indicates cylinder power by + reading.
CYL – .......Indicates cylinder power by - reading.
CYL ± .......Indicates the cylinder power by + reading when the refractive power is positive
for any axis angle. Indicates the cyl. power by - reading in other cases.
4-3
* The cylinder mode can be changed even after measurement.
* Data will be printed out with the mode status at the time of printout.
* When the cylinder mode is set to CYL+, the AXIS value in the KM measurement indicates
the angle of the major meridian. In other cases (CYL - or CYL ±), the AXIS value indicates
the angle of the minor meridian.
3. Press
to select the measuring mode.
The mode changes in the order of R/K,→ R,→ K,→ R/K... .
R/K mode ............. AR/KM measurements in succession
R mode ................. AR measurement
K mode ................. KM measurement
4. If you are “AR measuring” an IOL-implanted eye or an eye with a Contact Lens (CL) on,
turn on the IOL mode by pressing
.
IOL ON mark appears on the top left of the monitor.
IOL ON Mark
NOTE
• When “AR-measuring” an IOL-implanted eye or an eye with a Contact Lens (CL) on,
the IOL mode should be turned on. If such eye is measured without turning on the IOL
mode, an error message may appear and measurement may not be completed.
• The IOL mode automatically turns off by sliding the main body or after printout.
• The IOL mode automatically turns on when an error occurs for AR measurement three
times in a row. (Auto IOL*1)
*1 < Auto IOL >
The on/off of Auto IOL function can be changed in the system parameter. As to the changing
procedure, see “6.1 System Setups”.
4-4
5. Prepare the patient’s condition.
1) Clean the forehead rest and chin rest with a
clean gauze.
If a bunch of chin rest papers is fixed on the
chin rest, remove one paper.
2) Instruct the patient to take off his/her glasses
or contact lenses and to have a seat.
3) Instruct the patient to place his/her chin on
the chin rest and to rest his or her forehead
on the forehead rest.
4) Adjust the height of the chin rest by turning
the chin rest knob until the center level of
the patient’s eye aligns with the eye level
marker.
NOTE
• To relax the patient, explain the following before measurement. “This instrument
measures your eye with infrared rays to find which kind of lens fits you. The infrared
ray does no harm to your eyes.”
6. Perform rough alignment.
1) Instruct the patient to “Look through the
measuring window. As you will see a
picture of a balloon, watch the center of it
without straining.”
2) Manipulate the joystick to place the patient’s
eye on the TV monitor.
By moving the joystick laterally, the main
body moves right, left , back and forth. By
turning the joystick, the measuring unit
moves up and down. Align the eye position
to the measuring point with right, left, up
and down movements. Adjust the focus
with back and forth movements.
4-5
NOTE
• If the Min. pupil mark is on the iris in auto-aligned condition, turn off the auto-tracking
function and bring the Min. pupil mark into the center of the pupil to perform
measurement.
7. Perform fine alignment and focusing.
A. When using the auto-tracking function:
Move the mire ring close to the target so that the instrument automatically starts aligning (controls
the up, down, right, and left movement of the main body to bring the ring concentric with the
target).
When auto-shot function is on, the focusing indicator appears.
1) Move the joystick back and forth until the
focusing indicator shows the ideal state
”.
“
Too close to the patient’s eye
Pull back the joystick to move the main
body away from the patient’s eye.
Ideal state
Push the joystick forward to move the main
body close to the patient’s eye.
Too far from the patient’s eye
4-6
NOTE
• To turn off the auto-shot function, press
. To turn it on, press it again.
• The auto-shot function is available only when the auto-tracking function is on.
• When the auto-shot function is off, focus manually. The instrument is in ideal focus
when the mire ring is at its thinnest.
• Serial measurement starts automatically when the instrument is best aligned and in
ideal focus.
• The instrument may not perform correct measurement when the eyelash is on the Min.
Pupil Mark. In such cases, instruct the patient to open his/her eye wide. If the patient
can not open wide, lift the patient’s lid, paying attention not to press against the eyeball.
• The auto-tracking function does not work unless the mire ring is at around the center
of the measuring field. If the light is off center, manipulate the joystick to move it in.
When the position of the mire ring goes
outside of the working range of the
auto-tracking, a limit mark (a pair of
arrows) appears with “<LIMIT>” sign
on the left. In such a case, either move
the joystick in the direction of the
arrows or move the main body back
once to make alignment again. The
measurement will not perform as long
as the limit mark in on.
4-7
B. When not using the auto-tracking function:
Press
once to turn off the auto-tracking function. (The function turns on by pressing the
button again.)
1) Manipulate the joystick to place the mire ring
concentric with the target.
2) Move the joystick back and forth to focus
the mire ring until it becomes thinnest.
NOTE
• The instrument may not perform correct measurement when the eyelash is on the Min.
Pupil Mark. In such cases, instruct the patient to open his/her eye wide. If the patient
can not open wide, lift the patient’s lid, paying attention not to press against the eyeball.
4-8
4.3 AR (Refractive Power), KM (Corneal Curvature) Measurements
A. When using the auto-tracking function:
1. Perform measurement.
Serial measurement starts automatically when the instrument is best aligned and in ideal focus.
NOTE
• Instruct the patient not to blink during measurement.
a. When measuring mode is set to << R/K >>:
You will hear a short beep.
KM measurement will take place.
Measuring count will be shown on the TV monitor.
NOTE
• When AI mode*1 parameter is set to “OFF”, one serial measurement will contain
three shots. The number of shots can be changed in the system parameter.
When selected KM value is obtained and KM measurement completes, the latest value of KM
measurement will be shown on the TV monitor.
*1 < AI mode >
This is a mode where the instrument completes a measurement as soon as a selected value is
obtained. To activate the AI mode when the auto-shot function is off, the AI Mode parameter
should be set to “YES”. (See “6.1 System Setups2.)
4-9
You will hear a short beep again.
The patient’s view will be fogged.
AR measurement will take place.
You will hear a long beep, and count of measurement will be shown on the bottom left
of the TV monitor.
NOTE
• When the auto-shot function is on, AI Mode activates automatically regardless of
AI mode parameter setting, and the AR measurements will take place in Highspeed
mode*2 without pressing the start button.
• When the auto-shot function is off, the start button should be pressed manually to
start measurements. KM measurements will continue to AR measurements in
the Highspeed mode while the start button is held down.
When selected AR value is obtained, the
measurement is completed.
“<FINISH>” appears on the left of the
TV monitor, and the AR measurement
will be shown on the display panel. The
display panel always shows the latest
measurement.
*2 < Highspeed mode >
This mode, when the start button is held down in AR/KM measurement, enables you to keep
the fog throughout the serial measurement. As to the procedure of disabling or reactivating
the Highspeed mode, see “6.1 System Setups”.
4 - 10
NOTE
• If you want to repeat a measurement, press the start button again.
“< FINISH >” sign disappears, and auto-shot function starts again.
• The instrument can memorize up to 10 AR measurements each for right and left eyes.
If AR measurements exceed 10, older data will be cleared in turn.
b. When the measuring mode is set to << R >>:
You will hear a short beep.
The patient’s view will be fogged.
AR measurement will take place.
You will hear a long beep, and count of measurement will be shown on the bottom left of
the TV monitor.
When selected AR value is obtained, measurement completes.
“<FINISH>” appears on the left of the TV monitor, and the AR measurement will be
shown on the display panel. The display panel always shows the most recent measurement.
4 - 11
c. When the measuring mode is set to << K >>:
You will hear a short beep.
KM measurement will take place.
Measuring count will be shown on the TV monitor.
When selected KM value is obtained and
measurement completes, the latest value of KM
measurement will be shown on the TV monitor.
2. Measure the other eye in the same manner.
NOTE
• When error or error data*3 appears, the cause may be one of those mentioned below. If
those signs appear again after repeating measurement, check the followings.
a. Patient blinked during measurement.
b. The eyelid or eyelash is on the Min. pupil mark.
c. The patient’s pupil is smaller than the Min. pupil mark. (Let the patient be in a
dark room for a while and wait until the pupil diameter becomes large enough for
measurement.)
d. Retinal reflection is extremely low due to an optical disease such as a cataract.
e. There is some unusual reflection on the cornea during measurement. (In this case,
measurement may not be performed unless IOL mode is on.)
f. There is an extreme distortion on the cornea.
• When AI Mode parameter is set to “NO”,
take about three shots for AR
measurement. If the measurement result
is not stable, take some additional shots.
*3 < Error data >
Data that the confidence index of AR measurement is “E”. (See “6.1 System Setups”.)
4 - 12
B. When not using the auto-tracking function:
1. Perform measurement.
Press the start button.
The measuring count will start blinking.
NOTE
• Instruct the patient not to blink during measurement.
a. When the measuring mode is set to << R/K >>:
You will hear a short beep.
KM measurement will take place.
Measuring count will be shown on the TV monitor.
NOTE
• When AI mode*1 parameter is set to “OFF”, one serial measurement will contain
three shots. The number of shots can be changed in the system parameters
When selected KM value is obtained and KM measurement completes, the latest value of KM
measurement will be shown on the TV monitor
*1 < AI mode >
This is a mode where the instrument completes measurement as soon as the selected value is
obtained. To activate the AI mode when the auto-shot function is off, the AI Mode parameter
should be set to “YES”. (See “6.1 System Setups”.)
4 - 13
You will hear a short beep again.
The patient’s view will be fogged.
AR measurement will take place.
You will hear a long beep, and count of measurement will be shown on the bottom left of
the TV monitor.
NOTE
• KM measurements will continue to AR measurements in Highspeed mode*2 while
the start button is held down.
When selected AR value is obtained, measurement completes.
“<FINISH>” appears on the left of the TV monitor, and the AR measurement will be
shown on the display panel. The display panel always shows the latest measurement.
*2 < Highspeed mode >
This mode, when the start button is held down in AR/KM measurement, enables you to keep
the fog throughout the serial measurement. As to the procedure of disabling or reactivating
the Highspeed mode, see “6.1 System Setups”.
4 - 14
NOTE
• If you want to repeat measurement, press the start button again. “< FINISH >” sign
disappears and serial measurement starts again.
• The instrument can memorize up to 10 AR measurements each for right and left eyes.
If AR measurements exceed 10, older data will be cleared in turn.
b. When the measuring mode is set to << R >>:
You will hear a short beep.
The patient’s view will be fogged.
AR measurement will take place.
You will hear a long beep, and count of measurement will be shown on the bottom left of
the TV monitor.
When selected AR value is obtained, measurement completes.
“<FINISH>” appears on the left of the TV monitor, and the AR measurement will be
shown on the display panel. The display panel always shows the latest measurement.
4 - 15
c. When the measuring mode is set to << K >>:
You will hear a short beep.
KM measurement will take place.
Measuring count will be shown on the TV monitor.
When selected KM value is obtained and
measurement completes, the latest value of KM
measurement will be shown on the TV monitor.
2. Measure the other eye in the same manner.
NOTE
• When error or error data*3 appears, the cause may be one of those mentioned below. If
those signs appear again after repeating measurement, check the following.
a. Patient blinked during measurement.
b. The eyelid or eyelash is on the Min. pupil mark.
c. The patient’s pupil is smaller than the Min. pupil mark. (Let the patient be in a
dark room for a while and wait until the pupil diameter becomes large enough for
measurement.)
d. Retinal reflection is extremely low due to an optical disease such as a cataract.
e. There is some unusual reflection on the cornea during measurement. (In this case,
measurement may not be performed unless IOL mode is on.)
f. There is an extreme distortion on the cornea.
• When AI Mode parameter is set to “NO”,
take about three shots for AR
measurement. If the measurement results
are not stable, take some additional shots.
*3 < Error data >
Data with the confidence index of AR measurement is “E”. (See “6.1 System Setups”.)
4 - 16
4.4 CS (Corneal Size) Measurement
Fiducial line
1. Press
.
“<< CORNEAL SIZE >>”, a fiducial line, and
a guide line appears on the TV monitor. The
display panel shows as “12.0” which is the
initial value of the CS measurement.
The measuring mode changes as follows for
every press of
.
AR/KM → CS → PS → PD
↑
2. Manipulate the joystick to align the fiducial
line with the left end of the patient’s cornea.
3. Move the joystick back and forth to focus
the mire ring.
NOTE
• If the fiducial line has been out of
alignment, repeat step 2.
4. Move the guide line on the right of the TV
monitor with
or
to align it with the
right end of the patient’s cornea.
...............The guide line moves to the right.
(The display panel indication increases.)
...............The guide line moves to the left.
(The display panel indication decreases.)
NOTE
• The indication changes by steps of
0.5mm.
Guide line
4 - 17
5. Press the start button.
The measured value will be entered.
6. Measure the other eye in the same manner.
NOTE
• When AI mode and Print parameters are both set to “YES”, the CS measurement
should be performed before AR/KM measurement in order to print data together with
AR/KM results.
7. To change back to AR/KM measurement ........ Press
To go on to PS measurement............ Press
once.
To go on to PD measurement ........... Press
twice.
.
4 - 18
4.5 PS (Pupil Size) Measurement
Fiducial line
1. Press
.
(From CS Measurement, press once; from AR/
KM measurement, press twice.)
“<< PUPIL SIZE >>”, a fiducial line, and a
guide line appears on the TV monitor. The
display panel shows “5.0” which is the initial
value of the PS measurement.
2. Manipulate the joystick to align the fiducial
line with the left end of the patient’s cornea.
3. Move the joystick back and forth to make
focus of the mire ring.
NOTE
• If the fiducial line has been out of
alignment, repeat the step 2.
4. Move the guide line on the right of the TV
monitor with
or
to align it with the
right end of the patient’s cornea.
..... The guide line moves to the right.
(The display panel indication increases.)
..... The guide line moves to the left.
(The display panel indication decreases.)
NOTE
• The indication changes by steps of
0.5mm.
Guide line
4 - 19
5. Press the start button.
The measured value will be entered and be
shown on the display panel.
6. Measure the other eye in the same manner.
NOTE
• When AI mode and Print parameters are both set to “YES”, the CS measurement
should be performed before AR/KM measurement in order to print data together with
AR/KM results.
7. To change back to AR/KM measurement ........ Press
To go on to PD measurement ........... Press
once.
To go on to CS measurement ........... Press
twice.
.
4 - 20
4.6 PD (Pupil Distance) Measurement
A. Auto-PD measurement (When Auto-PD parameter is set to “YES”):
The PD measurement will have been completed during AR/ KM measurement.
NOTE
• The PD measurement will not be on the display but will be printed out together with
AR/KM results.
B. Manual PD measurement (When Auto-PD parameter is set to “NO”):
1. Press
.
(From PS Measurement, press once; from CS measurement, press twice; from AR/KM
measurement, press three times.)
Display for PD measurement appears on display panel as follows.
2. Instruct the patient not to move his/her head and eyes during measurement.
3. After careful alignment and focusing for the
right and left eyes, press the start button each
time.
4 - 21
NOTE
• If the patient’s head is tilted, straighten it before starting measurement.
• To measure monocular PD at the same time as the normal binocular PD measurement,
press the start button each time for the right-eye, center, and the left-eye, after careful
alignment for each.
To press the start button at the exact center position, let a patient wear the
frame with the mark on its center and bring the mark in focus.
It is recommendable to use the Pupil distance meter such as NIDEK PM-600 in
order to obtain a precise monocular PD.
• The r (right), c (center), and l (left) signs on the display panel disappears in turn as the
start button is pressed each to show that the location of the respective point has been
taken in.
4. When the measurement completes, the PD value will be shown on the display panel.
NOTE
• When AI mode and Print parameters are both set to “YES”, the PD measurement
should be performed manually before AR/KM measurement in order to print data
together with AR/KM results.
5. To change back to AR/KM measurement .......... Press
To go on to CS measurement ........... Press
once.
To go on to PS measurement............ Press
twice.
.
4 - 22
4.7 Measuring Sagittal Radius
1. Set the Sagittal parameter to “YES”.
For the procedure, see “6.1 System Setups”.
NOTE
• If the Print parameter has been set to
“Auto”, it should be set back to “Manu.”.
2. On condition than KM measurement has
been taken, press
.
The measuring mode changes to the Sagittal
radius measurement mode : Indicators of L
(Left), R (Right), U (Up), and D (Down) will
appear and the L blinks to show the position of
the illuminated fixation lamp that the patient
would see.
NOTE
• The selected KM value or the latest KM
value will be shown on the TV monitor.
• To quit the sagittal radius measurement,
press
.
3. Instruct the patient to look at the red light
on the left side and not to move his/her head.
4. Manipulate the joystick to place the mire ring
concentric with the target.
5. Move the joystick back and forth to focus
the mire ring until it becomes thinnest.
4 - 23
6. Press the start button.
Sagittal radius of the right part of the cornea
will be measured.
“L” changes to “*”, then “R” starts blinking.
NOTE
• If the measurement is erroneous, “L”
changes to “E (Error)” and “ =NEXT”
message appears. In such a case, repeat
the measurement by pressing the start
button. If “E” remains after repeating
measurement, press to proceed to the
“R” side.
7. Instruct the patient to look at the red light
on the right hand side and repeat steps 4 - 6
for the sagittal radius of the left side of the
eye.
8. Take measurements for D (Down) and U
(Up) sides in the same manner.
When all four measurements for a single eye
are complete, eccentricity value (E=) appears
and the mode returns to R/K mode.
NOTE
• By the serial measurement, selected values for each sides (L, R, U and D) will be
obtained individually, and the eccentricity data will be obtained by calculation on the
basis of the selected values for the 4 sides and KM measurement (either selected or the
latest). When Sagit Axis parameter is set to “AXIS”, these values will be converted
for the angle of the major meridian which has been obtained by KM measurement.
• Concerning the side at which “E” is indicated, the value of the opposite side on the
same meridian will be used for the calculation of eccentricity.
• If the eccentricity is indicated as “E = Err”, press
measurement, however, clears the former data.
to repeat measurement. Repeating
4 - 24
9. Repeat the same procedure for the right eye.
It is possible to start binocular sagittal radius measurement after KM measurements for both
eyes have been completed.
10. Press
to print the Sagittal Radius measurement.
NOTE
• If KM measurement is performed once again without pressing the
after Sagittal
Radius measurement, the eccentricity data will be recalculated according to the new
selected KM value, which is based on the memorized former data and the newly
measured data. When measuring an additional patient, be sure to press the print button
beforehand to print and clear data.
* The followings are sample printouts for the left eye and explanations of each data.
< Sample printout 1 >
* This is the printout for when the Sagit Print parameter is set to “Short”.
4 - 25
< Sample printout 2 >
* This is the printout for when “Sagit Print” parameter is set to “All”.
< SAGITTAL > = Sagittal radius on each side
SUP. = Superior side
INF. = Inferior side
TEM. = Temporal side
NAS. = Nasal side
A = Axis of Major meridian (of KM measurement)
(F = Fixation Angle)
S = Sagittal data which the dRo value is added to
or reduced from Sagittal Radius values
e = Eccentricity values of each Sagittal radius
eh = Eccentricity on horizontal meridian
ev = Eccentricity on vertical meridian
E = Total Eccentricity
ASTc = Corneal cylinder at the center
ASTp = Corneal cylinder at the periphery
Rh = Average of corneal curvature on horizontal
meridian
Rv = Average of corneal curvature on vertical meridian
Ro = Average of corneal curvature at the center
dRo = Difference of corneal curvature between R1
and R2
dAST = Difference of corneal cylinder between the
center and the peripheral
§5
PRINT OUT
5.1 Printing Measurement Results
1. Press
when measurements are complete.
Measured data will be printed out.
NOTE
• When AI mode and Print parameters are set to “YES”, data will be automatically
printed out as soon as AR/KM measurements are completed for both eyes.
• Do not touch the printer paper while printing out.
This may cause loss of text and light printed text.
• The memory indicator will be illuminated while measured data is in the memory, and
as long as the lamp is on, data can be printed anytime you like.
• After printing, the former data will be cleared when the next measurement is begun.
• When the memory indicator is off, the
serves to feed the paper.
< Sample Printout 1 >
Memory Indicator
Print Button
NOTE
• This sample shows the printout for the Print Form. Parameters have,. not been changed
since shipment (standard print).
5-2
< Sample Printout 2 >
Description of printout contents
Patient number
Space for name and sex
Measuring date and time
Vertex distance *1
Near work distance *2
(
’)
AR Measurement
( ’), Confidence index *3
S = Sphere, C = Cylinder, A = Axis
(
’)
Selected AR value *4
SE value *5
( ’)
Eyeprint *6
(
’)
Trial lens data *7
( ’)
CL conversion value *8
(
KM measurement (
’)
’)
R1 = Minor meridian
R2 = Major meridian
AVE = Average of R1 and R2
CYL = Corneal cylinder
deg = Corneal cylinder axis
Selected KM value *9
CS measurement, PS measurement
Measurable range over error *10
Pupil distance
Distance PD
Comment *12
, (Monocular PD)
, Near PD
*11
(
)
5-3
NOTE
• The numbers that follows each descriptions show the Print Form. Parameters setting
required to print the contents.
.....Printed out when the parameter is set to “Short”.
When selected value is not obtained, “ ’ ” will be printed out.
.....Printed out when the parameter is set to “User”.
With this setting, printing or not printing “ ’ ” depends on the setting of
parameter items # 11 - 20.
*1 < Vertex distance >
The distance between the corneal vertex to the posterior surface of the spectacle lens.
*2 < Near work distance >
Used for near PD calculation. Selectable between 35 - 70 cm in the system parameter.
*3 < Confidence index >
One of 6 steps (9, 8, 7, 6, 5, or E) will be printed out. “E” stands for error data.
*4 < Selected AR value >
Printed out when more than three AR measurements (without error or error data) are in the
memory.
*5 < SE (Sphere Equivalence) value >
Calculated for selected AR value (or the latest value when the selected AR value has not been
obtained) and CL conversion value.
5-4
*6 < Eyeprint >
Tells graphically the patient’s refractive status based on the selected value. The eyeprint has 8
patterns.
Emmetropia
Astigmatism
Simple myopic astigmatism
Myopia
Myopic astigmatism
Simple hyperopic astigmatism
Hyperopia
Hyperopic astigmatism
*7 < Trial lens data >
The selected AR value is examined and indicated by the cylinder mode (cylinder reading
direction) which would make the sphere trial lens have lower power for convenience.
*8 < CL conversion value >
The selected AR values are converted into CL values, letting the vertex distance (VD) be 0
mm.
*9 < Selected KM value >
Printed out when more than three KM measurements (without error data) are in the memory.
5-5
*10 < Measurable range over error >
Err +o .................. The spherical power is over the measurable limit of + side.
Err -o ................... The spherical power is over the measurable limit of - side.
Err co ................... The cylindrical power is over the measurable limit.
When the Error Code parameter is set to “YES”, the error code will be printed out as soon as
an error occurs.
*11 < Near PD >
PD for near work distance of 35 cm (factory setting). Use it for prescription of reading glasses
or multifocals.
*12 < Comment >
It is possible to enter some letters or marks as you like on the printout. For the procedure of
entering comments, see “6.3 Entering Comments”.
5.2 Eyeprint
Aside from normal printouts,
serves to print
the Eyeprint and PD value based on selected AR
value or latest value.
This will be printed out regardless of the
setting in the system parameter. It will help
you to explain to the patient the refractive
condition of his/her eyes. The Eyeprint has 8
patterns, the same as that on the normal
printout described in “5.1 Printing
Measurement Results”.
§6
OTHER FUNCTIONS
6.1 System Setups
The ARK-700A is equipped with a function to change parameters of several system conditions
according to the operator’s use. The ways of confirming and changing each parameter are
described as follows.
1. Press
button.
The TV monitor displays “PARAMETER SET << 1/5 >>”, and the display panel shows the
setting content and the parameter item number.
Setting content
Item number
2. Establish the mode which contains the desired item, referring to the parameter table on
pages from 6-4 to 6-8.
, the setting mode changes in the order shown below.
For each press of
Setting mode 1 (Item # 1 - 10) → Mode 2 (Item # 11 - 20) → Mode 3 (Item # 21 - 30) → Mode
4 (Item # 31 - 40) → Mode 5 (Item # 41 - 43) → Date & Time setting mode → Setting mode 1
→ ……
6-2
3. In the selected mode, press
.
Each contents will be printed as follows.
No.
Item
Content
6-3
4. Make the desired item number appear on the display panel.
For each press of the start button, the item number increases.
NOTE
• Pressing the start button on the condition that the last number of the mode is shown
makes the first item number of that mode appear again.
5. By pressing
or
, change the setting.
NOTE
• Refer to the parameter table on the next page for the setting contents.
• Underline indicates factory setting. (Factory setting may vary according to the
destinations.)
6. To finish setting ............................................................. Press
To go on to the date and time setting .......................... Press
.
.
NOTE
• The parameter setting will be kept in memory even though the power is cut off due to
an internal battery*1.
*1 The battery is rechargeable. When you are operating the instrument for the first time after
unpacking or when the instrument has not been operated for a long time (longer than 1 month),
the clock may reset to zero, and system parameters and comment settings may return to factory
settings. In such a case, turn on the power and leave it “ON” for a while to recharge the battery.
The battery needs 24 hours for a full charge. If you are using the instrument 8 hours a day, you
will have to keep the power on for 3 days before the battery is fully charged. Once the battery
is fully charged, the instrument operates normally for daily use.
Rechargeable lithium battery is used in the instrument. When disposing of the battery-mounted
board, follow local governing ordinances and recycling plans regarding disposal or recycling
of device components.
(The lithium battery is not user replaceable.)
6-4
Parameter Table
< Setting Mode 1 >
No.
Items
Contents
1
Step
0.01D / 0.12D / 0.25D
2
Vertex D.
0mm / 10.5mm / 12mm / 13.75mm / 15mm / 16.5mm
3
KM Unit
mm / D
4
KM Display
R1, R2 / AVE, CYL
5
Axis Step
1o/5
6
Meas. Mode
Con. / Nor.
7
Print
Manu. / Auto / NO
8
AI Mode
YES / NO
9
Econo. Print
YES / NO
10
Print Format
Short / User
o
[Item No. 1] The indication step of SPH and CYL data for AR measurement as well as the step of
corneal refractive power measurement (permitting the corneal curvature radius to be
converted to refractive power).
[Item No. 2] The distance between the corneal vertex to the posterior surface of the spectacle lens
when patient wears them.
[Item No. 3] Selection of whether to indicate the corneal curvature with radius (mm) or refractive
power (D).
[Item No. 4] Selects the KM measurement indication between R1 (Minor meridian) & R2 (Major
meridian), and AVE (Average of R1 and R2) & CYL (corneal cylinder).
[Item No. 5] The indication step of AXIS data for AR measurements.
[Item No. 6] The way of fogging for AR serial measurement.
Con. (Highspeed mode)
.................. By holding down the start button, the fog keeps on through out the serial
measurement. It is useful for children who do not fixate their eyes long.
Nor............ The fog will be released for each measurement even though the
start button is held down. It is useful for patients who accommodate
easily.
[Item No. 7] The way to start printing, or not printing.
Manu. ....... Data can be printed out by pressing
.
Auto.......... Data will be printed out after measurement completes. (Only active when
AI mode parameter is set to “YES”.)
NO ............ Data will not be printed out.
[Item No. 8] Selection of whether or not to use the AI mode.
When set to “YES”, the serial measurement completes when the selected value is
obtained.
[Item No. 9] Selection of whether or not to use the economical print function.
When set to “YES”, the printing will come out with narrow line-spacing so that the
printer roll can be saved.
[Item No. 10] The format of printing measurement results. (See “5. PRINT OUT”.)
Short ......... Only the restricted data will be printed out. (Short print)
User .......... Items that are specified in parameter item # 11 - 20 will be printed out.
6-5
< Setting Mode 2 >
No.
Items
Contents
11
Patient No.
YES / NO
12
Patient No.
0001 - 9999
13
Name Print
YES / NO
14
Date Format
Y.M.D / M.D.Y / D.M.Y / NO
15
AR Print
All / Short
16
KM Print
All / Short
17
SE Print
YES / NO
18
Eye Print
YES / NO
19
TL Print
YES / NO
20
CL Print
YES / NO
[Item No. 11] Selection of whether or not to print the patient number.
[Item No. 12] The setting of patient numbers.
.......................... The patient number increases.
.......................... The patient number decreases. (The
works as a reset button,
if pressed at first, and the value resets to “0001”.)
[Item No. 13] Selection of whether or not to provide spaces for writing the patient’s name and sex
on the printout.
[Item No. 14] The format of date on the printout.
Y.M.D = Year, Month, Day
M.D.Y = Month, Day, Year
D.M.Y = Day, Month, Year
N O = No printing
[Item No. 15] The print format of AR measurement.
All .......................... All data and the selected values are printed out.
Short ....................... Only the selected values are printed out.
[Item No. 16] The print format of KM measurement.
All .......................... All data and the selected values are printed out.
Short ....................... Only the selected values are printed out.
[Item No. 17] Selection of whether or not to print SE values for the selected value (or the latest
value when the selected AR values have not been obtained).
[Item No. 18] Selection of whether or not to print Eyeprint.
[Item No. 19] Selection of whether or not to print trial lens data, which is based on the selected AR
values.
[Item No. 20] Selection of whether or not to print CL conversion values, which are based on the
selected AR values, and SE values of the selected AR values.
6-6
< Setting Mode 3 >
No.
Items
Contents
21
Conf. Index
YES / NO
22
Near PD
YES / NO
23
Working D.
35 - 70cm / 14 - 28inches
24
Auto IOL
YES / NO
25
Auto PD
YES / NO
26
KM Continue
1 - 10 (3)
27
Beep
High / Low / NO
28
TV Auto-OFF
YES / NO
29
Chart
Scene
30
Ref. Index
n=1
1.3375 / 1.336 / 1.332
[Item No. 21] Selection of whether or not to print confidence index.
[Item No. 22] Selection of whether or not to print Near PD data.
[Item No. 23] Setting of the near work distance, which is referred to as near PD calculation, between
35 - 70 cm (5 cm steps). After these, there are options of in-inch indication between
14 - 28 inches (2 inch steps).
[Item No. 24] Selection of whether or not to use the Auto IOL function.
When set to “YES”, the IOL mode automatically turns on after three times of
erroneous measurement.
[Item No. 25] Selection of whether or not to measure PD at AR/KM measurement. (Applies only
when measuring both eyes.)
[Item No. 26] Setting of the number of the serial measurement for KM measurement in R/K or K
mode.
[Item No. 27] Selection of the tone of beeps, which sound during measurement.
[Item No. 28] Selection of whether or not to use the Auto-OFF function. When set to “YES” and
there is no operation for more than 5 minutes, the TV monitor turns off automatically
and the display panel shows time. The monitor ON condition recovers by pressing
any button.
[Item No. 29] Setting of the chart
[Item No. 30] Selection of the corneal refractive index.
6-7
< Setting Mode 4 >
No.
Items
Contents
31
I/F Mode
NIDEK
32
I/F Format
All / Short
33
Baud-Rate
9600 / 4800 / 2400 / 1200
34
Bit Length
7/8
35
CR Code
YES / NO
36
Error Print
YES / NO
37
Error Code
YES / NO
38
Error Data
YES / NO
39
IN port (LM)
NIDEK
40
LM Data Prt.
YES / NO
[Item No. 31] Setting of the instrument to communicate with.
Communicating with a NIDEK-brand instrument ..... NIDEK
(There is no option besides “NIDEK”.)
[Item No. 32] The format of sending data. Selectable between “All”, which sends out all data
measured, and “Short”, which sends out only the restricted data.
[Item No. 33] Selection of baud-rate (bit transmission speed) for communication.
[Item No. 34] The bit number for a single character used for communication.
[Item No. 35] Selection of whether or not to attach CR (carriage return) code at the end of sending
data.
[Item No. 36] Selection of whether or not to print error message for AR measurement.
[Item No. 37] Selection of whether or not to display error code for AR/KM measurement and AR
printing.
[Item No. 38] Selection of whether or not to display and print error data of AR measurement.
(When set to “YES”, “Err” appears after erroneous measurement and then the data
blinks to show that it is an error data.)
[Item No. 39] Setting related to the lensmeter to be connected to
side.*1 Never change
the setting.
[Item No. 40] Selection of whether or not to print the communication data for the lensmeter connected
to
side by the printer built in the ARK.*1
When the parameter is set to “YES”, the printout of the data will come out from the
printer by pressing the print button of the lensmeter. Use the lensmeter provided
with the function of printing out the communication data. For details, refer to
Operator’s Manual of the lensmeter.
*1
side of the ARK cannot be used if the ARK is equipped with an optional IC card Reader/
Writer.
6-8
< Setting Mode 5 >
No.
Items
Contents
41
Sagittal
YES / NO
42
Sagit Axis
AXIS / FIX
43
Sagit Print
All / Short
44
45
46
47
48
49
50
[Item No. 41] Selection of whether or not to measure Sagittal radius after KM measurement in R/
K or R mode.
[Item No. 42] Selection of whether or not to convert the sagittal radius measurement for the axis of
the major meridian which has been obtained by KM measurement. To convert data,
choose AXIS.
[Item No. 43] Selection of the print format of sagittal radius measurement.
All .......................... All data is printed out (See page 4-25).
Short ....................... Only sagittal radius value and the total eccentricity is printed
out (See page 4-24).
6-9
6.2 Setting Date and Time
1. Press
.
2. Press
five times so that the date and time setting mode will be established.
The TV monitor shows “CLOCK SET” while the display panel shows the date with the “year”
blinking. The blinking indicates that the number is changeable.
Year
Month
Day
NOTE
• The clock stops during date and time setting. It restarts when the setting mode is
released by pressing
or
.
3. Press the start button to blink the position that you want to change.
The blinking order is as follows.
Year → Month → Day → Hour → Minutes → Year → … …
4. Press
or
to change the setting.
......................................... The number increases.
......................................... The number decreases.
5. Repeat steps 3. and 4. to set whole contents of date and time.
6. After setting desired parameters, press
to release the mode.
If you press
instead of
, the mode returns to the parameter setting mode 1.
NOTE
• The internal clock will be working even though the power is cut off due to an internal
battery. If the date and time setting goes wrong, recharge the battery. (See page 6-3,
*1)
6 - 10
6.3 Entering Comments
1. Turn off the power switch.
2. While pressing down
, turn on the power.
The following will be printed out.
< Sample Printout >
Parameters
Parameters
for servicing
Date & time
Comment
Model
6 - 11
3. Press
six times to establish the mode for entering comments.
The following appears on the display panel.
Character code
Line No. Figure No.
NOTE
• It is possible to input up to 24 × 2 characters.
Figure No.
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
1
Line No.
2
4. Make the desired figure number and the desired line number appear on the display panel.
By pressing the start button, the figure number increases. By pressing the start button after
figure number 24 is displayed, the line number changes.
5. Press
or
to change the character code to the desired one.
........................................... The character code increases.
........................................... The character code decreases.
For the character code, refer to the character code on the next page.
6 - 12
Character Code Table
The following characters (marks) are available to input.
First digit of character code
2
3
4
5
6
7
8
9
A
b
0
(SPC)
0
＠
P
◇
p
■
－
タ
ミ
1
！
1
A
Q
a
q
。
ア
チ
ム
2
”
2
B
R
b
r
「
イ
ツ
メ
3
＃
3
C
S
c
s
」
ウ
テ
モ
4
＄
4
D
T
d
t
、
エ
ト
ヤ
5
％
5
E
U
e
u
・
オ
ナ
ユ
6
＆
6
F
V
f
v
ヲ
カ
ニ
ヨ
7
’
7
G
W
g
w
ァ
キ
ヌ
ラ
8
（
8
H
X
h
x
ィ
ク
ネ
リ
9
）
9
I
Y
i
y
ゥ
ケ
ノ
ル
A
＊
：
J
Z
j
z
ェ
コ
ハ
レ
Second digit of
character code
b
＋
；
K
［
k
｛
ォ
サ
ヒ
ロ
c
，
＜
L
￥
l
|
ャ
シ
フ
ワ
d
－
＝
M
］
m
｝
ュ
ス
ヘ
ン
E
．
＞
N
↑
n
→
ョ
セ
ホ
゛
F
／
？
O
↓
o
の
ッ
ソ
マ
゜
< Example >
1
2
3
1
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
N
I
D
E
K
A
R
K
-
7
0
0
A
2
· If you want to input the letter N in the figure number 7 of the line number 1, display “4E 17” on the panel.
6. Repeat 4. and 5. to enter your comment.
7. After entering the comment, press
to release the setting mode.
If you press
instead of
, the mode returns to the parameter setting mode 1.
NOTE
• The comment setting will be kept in memory even though the power is cut off due to
an internal battery. If the setting returns to the factory setting, recharge the battery.
(See page 6-3, *1)
6 - 13
6.4 Measuring Hard Contact Lenses
1. Fix the mount for optional CL holder onto
the upper end of the head rest post and fix it
with the fixing screw.
2. Fill the concave top of the CL holder with
water.
3. Put the contact lens in water with the
measuring surface facing upward.
When measuring the concave surface, place the
lens with the concave surface up. When
measuring the convex surface, place the lens
the other way.
NOTE
• Be careful not to let bubbles get under the
lens or water or dust on the lens.
4. Insert the pin of the CL holder into the cavity
on the top of the mount and turn the holder
with the measuring surface facing toward the
measuring window.
5. Select KM measurement mode and measure
the lens in the same manner as usual KM
measurement.
NOTE
• When measuring the convex surface of the contact lens, axis angle can be read directly.
When measuring the concave surface, however, the measured axis should be read
inversely.
• Soft contact lenses cannot be measured.
§7
TROUBLESHOOTING GUIDE
In the event that the instrument does not work correctly, correct the problem according to the
following table before contacting your authorized distributor.
Symptom
Suggestion
・The power cord may not be well connected to the outlet.
Reconnect it securely.
The TV monitor and display panel
does not turn on.
・The power switch may not have been turned on. Check the
power switch.
・The fuses may be blown. If so, replace the fuses with new
ones.
・The auto-OFF function may have been executed. Try to
The TV monitor does not turn on
(cannot see well) even though the
power is on.
The monitor display disappears
suddenly.
The monitor display runs.
recover the ON condition by pressing any button.
・The brightness may be darkly adjusted. Open the cover for
switches and adjust the brightness by turning the brightness
control.
・The auto-OFF function may have been executed. Try to
recover the ON condition by pressing any button.
・The TV display is not horizontally or vertically locked. Adjust
it with the H or V control.
・The locking knob may be fixing the main body. Loosen the
locking knob which is beside the joystick.
The main body cannot be moved
laterally.
・The locking knob may be braking the main body. Loosen
the lockinig knob which is beside the joystick.
・Check the printer paper. If the paper is out, set in a new
printer roll.
The instrument does not print.
・The Print Form. parameters may be set to "NO". Reset the
Print Form. parameters.
7-2
Symptom
The printer does operate, however,
printed results cannot be obtained.
Suggestion
・The printer roll may be set with the wrong side up. Set it
with the correct side up.
・The auto-tracking button may not be on. Turn on the
tracking function by pressing
.
・The auto-shot button may not be on. Turn on the auto-shot
function by pressing
.
・Such as room illumination may be reflecting on the cornea.
Change the location and try again.
・The auto-tracking function or auto-shot function does not
Auto-tracking function or auto-shot
function does not work.
work on some eyes such as keratoconus or lately operated
on corneas. In such a case, turn off the auto-tracking
function to perform measurement.
・The patient who has substantial ocular ataxia or who cannot
fixate his/her eyes, there are cases that auto-tracking
function or auto-shot function does not work. In such cases,
turn off the auto-tracking function and start a measurement.
・If the instrument is installed in the vicinity of window where
the instrument is exposed to sunshine, light interference may
adversely affect these functions. Change the installed
position of the instrument and perform a measurement
again.
・The patient may have blinked during measurement. Instruct
the patient not to blink, and try again.
・The eyelid or eyelashes may be obstructing the
measurement. Instruct the patient to open the eye widely. If
his/her opening is not enough, open it with your hand,
paying attention not to press against the eye ball.
"Err" appears.
・The pupil may be too small for measurement. Let the
patient be in a dark room for a while until the pupil opens
enough, and try again.
・If you are measuring an IOL-implanted eye or an eye
wearing a CL, press
and try again.
IOL appears on the monitor.
・The data may have exceeded the measurable limit.
Date and time setting goes wrong, or
the system parameters and comment
settings return to the factory settings.
・The internal battery may be dead. Turn the power on and
leave it for 24 hours to recharge the battery.
* If the problem cannot be solved by following the suggestions above, contact your authorized
distributor.
§8
MAINTENANCE
8.1 Replacing Printer Roll
When a red line appears on the side of the printer paper, it means that the paper is running short.
In such a case, stop using the printer and replace the roll with a new one.
NOTE
• Do not run the printer without paper.
It ruins the printer head.
• Do not pull the paper in the printer forcefully. This may cause malfunction of the
printer. Be sure to use the
to feed the paper.
1. Pull the printer cover to open.
2. Flip up the lever on the left side, and turn
the gear on its left backward in order to feed
the paper out.
3. Pull up the shaft to take out the used paper
roll, and then remove the shaft out of the roll.
8-2
4. Insert the shaft in the new printer roll.
5. Set the roll into the printer housing.
NOTE
• If the roll is set in such a way that the
paper becomes upside down, it is not
possible to print data on the paper.
6. Make sure the paper is not jagged, cut it
cleanly, then pass the paper through the
printer as shown on the figure on the right.
NOTE
• When the paper comes to point “ ”, turn
the gear forward to feed the paper.
7. Pass the paper through the printer cover.
NOTE
• To remove the slack of paper, turn the gear
forward.
8. Flip down the lever and push the printer
cover towards the main body.
8-3
8.2 Fixing a Bunch of Chin Rest Paper
1. Disconnect two fixing pins from the chin rest.
2. Take out proper numbers of chin rest paper from a pack of chin rest paper.
It is impossible to fix a whole bunch of chin rest paper. Be sure to fix the bunch with 6mm
thickness or less. Pay attention not to scatter the chin rest papers.
3. Insert the fixing pins into the holes in the
chin rest papers.
Insert the disconnected pins into both holes of
the bunch of chin rest paper.
4. Fix the bunch of chin rest paper onto the chin
rest.
1) Insert the pins into the holes in the chin rest
while holding both fixing pins and bunch
of chin rest paper.
Fixing pin
Bunch of
chin rest paper
2) Push the pins into the holes of the chin rest with the other hand.
8-4
8.3 Replacing Fuses
If the instrument does not work even though the power switch is ON, fuses may be burnt out. In
such a case, replace them.
CAUTION
• Perform replacement work in a stable and open space.
If the instrument falls, it may malfunction.
• Never use a fuse other than the specified one.
This may cause fire.
1. Turn off the power and remove the power
cord.
2. Lock the main body to the base unit with the
locking knob and lay it down gently.
3. Turn the fuse holders counterclockwise as
indicated by an arrow with a screwdriver
and remove them.
4. Pull out the fuse holders from the base unit.
8-5
5. Remove the used fuses from the fuse holders.
6. Insert new fuses into the fuse holders.
7. Turn the fuse holders clockwise while pressing them down with the screwdriver and set it
into the main body.
CAUTION
• If fuses blow frequently, do not touch the inside of the instrument but contact your
authorized distributor.
If you touch inside the instrument, you may get an electrical shock.
8-6
8.4 Cleaning the Measuring Window
When the measuring window gets fingerprints or dust on it, the reliability of the measured value
will be lowered substantially. Check the dirt on the measuring window before use, and then
clean it if it is dirty.
1. Blow off the dust on the measuring window with a blower.
2. Wrap the lens cleaning paper around a thin
stick such as a chopstick (or cotton swab)
and wipe the glass of the measuring window
with a material moistened with alcohol.
Use a thin stick which will not damage the glass.
(Never use hard objects such as a metal
product.)
Wrap a cleaning paper around the tip.
Wipe the measuring window lightly from center
to outside along an arc.
Pay attention not to put alcohol onto the sensor
window and cover, etc. except the measuring
window.
3. Check if the window is cleaned using a
penlight. If not, clean it again with a new
cleaning paper.
Apply light with a penlight and change the view
angle to check the dirt clearly.
Penlight
Be sure not to wipe the sensor window except
the central measuring window with alcohol.
Wipe the dirt of the sensor window with a dry
cleaning paper.
8-7
8.5 Cleaning Exterior
When covers or panels become dirty, wipe with a dry and soft cloth. For stubborn dirt, immerse
the cloth in a neutral detergent, wring well, and wipe. Finally wipe with a dry and soft cloth.
NOTE
• Never use an organic solvent such as paint thinner.
It could ruin the surface of the instrument.
8.6 List of Parts for Replacement
Printer roll
Order Number
Printer roll
80620-00001
Bunch of chin rest paper
32903-M047
～
Fuse (100/120V
)
～
Fuse (200-220/230-240V
80402-02041
)
80402-02039
§9
IC CARD SYSTEM (OPTIONAL)
If the ARK-700A is equipped with an IC card system• –1, it can transmit measured results to the
IC card.
There are two ways to transmit data to the IC card.
A. To transmit data without pressing
.
1. Take a measurement.
2. Insert the IC card into the slot of the Reader/
Writer.
Data will be written on the IC card and the card
will come out automatically.
NOTE
• With this procedure, data in the ARK700A will be cleared after data
transmission.
B. To transmit data by pressing
.
1. Insert the IC card into the slot of Reader/
Writer.
2. Take measurement.
3. Press
.
Data will be printed out and at the same time written on the card. The card then will come out
automatically.
NOTE
• In this case, data in the ARK-700A will not be cleared.
*1 When the ARK-700A is equipped with an IC card system, the interface connector on
side can not be used.
§10
SPECIFICATIONS
{ Measurement of refractive power (AR measurement) (VD=12mm)
· Spherical power (S)
Measurable range
Indication step
· Cylindrical power (C)
Measurable range
Indication step
–18.00D - +23.00D
0.01D/0.12D/0.25D
0D - ± 8.00D
0.01D/0.12D/0.25D
[Accuracy*1]
Criterion
Measuring range
Deviation from the
nominal value
Spherical and 0.00 to ± 10.00D ± 0.25D
cylindrical vertex
power
>10.00D (absolute) ± 0.50D
· Cylinder axis (A)
Measurable range
Indication step
0 º - 180 º
1º/5º
[Accuracy*1]
Criterion
0.25D to ± 0.50D
Cylinder axis for
>0.50D to 3.00D
cylinder power
>3.00D
Deviation from the
nominal value of
the ARK
± 10°
± 5°
± 3°
*1 The accuracy specifications are based on the results of eye
model testing performed in accordance with ISO 10342:
1997, Ophthalmic Instruments–Eye Refractometers.
* Cylinder axis shall be indicated as specified in ISO 8429.
· Minimum pupil diameter
measurable
φ 2.5mm
· Vertex distance
0mm/10.5mm/12mm/13.75mm/15mm/16.5mm
· Target fixation
Auto-fogging system
10 - 2
{ Measurement of corneal curvature (KM measurement)
· Corneal curvature (R1, R2, AVE)
Measurable range 5.00mm - 10.00mm
Indication step
0.01mm
Accuracy
± 0.05mm
· Corneal spherical power (R1, R2, AVE)
Measurable range 33.75D - 67.50D (n=1.3375)
Indication step
0.01D/0.12D/0.25D
Corneal refractive
index
n = 1.3375/1.336/1.332
· Corneal cylindrical power (CYL)
Measurable range 0D - ± 10.00D
Indication step
0.01D /0.12D/0.25D
· Corneal cylinder axis (AXIS)
Measurable range 0 º - 180º
Indication step
1º/5º
· KM measurement range φ 3.3mm on cornea (For corneal curvature of 7.7mm)
· Size of mire ring
φ 2mm on cornea (For corneal curvature of 7.7mm)
{ Measuring time
· AR measurement
· KM measurement
· Serial measurements
0.3 seconds/eye
Less than 0.1 second/eye
Less than 2 seconds/eye
{ PD measurement
· Measurable range
· Indication step
30 mm - 85 mm (For Near PD : 28 mm - 79 mm, WD=35cm)
1 mm
{ CS measurement
· Measurable range
· Indication step
10.0mm - 14.0mm
0.5mm
{ PS measurement
· Measurable range
· Indication step
1.0mm - 10.0mm
0.5mm
10 - 3
{ Sagittal Radius measurement
· Measurable angle
25 º ‹each from the center (Up, Down, Temporal side, Nasal side)
· Sagittal Radius measurement
Measurable range
5.00 - 10.00mm
Indication step
0.01mm
· Eccentricity (E)
– 4.10 - +2.05
{ Printout
·
·
·
·
Date and time of measurement, and Patient number
Vertex distance
Near working distance
AR measurements
Maximum 10 stored measurements for each right and left eye,
Selected value (when there are 3 or more measurements),
Latest value (When there are 2 or less measurements),
· KM measurements
Maximum 10 stored measurements for each right and left eye,
Selected value (when there are 3 or more measurements),
Latest value (When there are 2 or less measurements)
· PD measurements
Measured value of Distance PD
Calculated value of Near PD
(For Near work distance between 35 cm - 70 cm, changeable in steps
of 5 cm.)
· Corneal size measurement
· Pupil size measurement
· CL conversion value
· SE (Sphere Equivalence) value
· Err (Measurable range over error)
· Trial lens data
· Eyeprint
{ Chart
· Scenery chart
1
10 - 4
{ Alignment observation
· 5 inch TV monitor
{ Measurement indication
· LED digital display ...... AR measurements, PD measurements
· TV monitor .................. KM measurements
{ Interface
· Interface which complies with RS -232C standard
Outputs all data which can be printed out.
{ Cross-slide travel
· Back and forth : 36 mm, right and left : 85 mm, up and down : 28 mm
{ Working range of auto-tracking
· φ 4 mm on cornea
{ Power source*1
· A. 100/120Vac
B. 200 - 220/ 230 - 240Vac
± 10%
± 10%
100VA
100VA
50/60Hz
50/60Hz
{ Dimensions and weight
· 260 (W) × 485 (D) × 451 (H) mm
20 kg
{ Environmental conditions (In transference and storage)
· Temperature
· Humidity
– 40 ºC - 70 ºC
10 - 100% (Non-condensing)
{ Environmental conditions (In use)
· Temperature
· Humidity
· Atmospheric pressure
10 ºC - 40 ºC
30 - 75% (Non-condensing)
700 - 1060 hPa
* Specifications are subject to change without notice for improvement.
*1 The electrical rating, A or B for the instruments is factory-configured.
§11
ACCESSORIES
11.1 Standard Accessories
4 Fuses (2 of them are located in the body.)
4 rolls of Printer paper (One of them is set in the printer.)
1 Power cord
1 Dust cover
1 sheaf of Chin rest paper
11.2 Optional Accessories
IC card system (Factory-built option)
Video output (Factory-built option)
Interface cable
Model eye
Contact lens holder
APPENDIX. A GLOSSARY
· AI Mode
A mode where the instrument completes AR/KM measurement as soon as the selected values are obtained.
· Auto IOL
A function where the instrument automatically turns on the IOL mode after three times of erroneous AR
measurement.
· Auto-shot
A function where the instrument automatically starts serial measurement as soon as the instrument is best
aligned and in ideal focus.
· Auto-tracking
A function where the instrument automatically controls the up, down, right, and left movement of the measuring
part to make alignment. The auto-tracking function works in a range of 4 mm in diameter on the cornea.
· Comment
It is possible to enter some letters or marks as you wish on the printout. The instrument accepts up to 24 letters
× 2 lines as a comment.
· CS
Abbreviation of Corneal Size.
· Eyeprint
Tells graphically the patient’s refractive status based on the selected AR value (or the latest value when the
selected value has not been obtained).
· Highspeed Mode
The mode where the start button is held down in AR measurement, and you are enabled to keep the fog
throughout the serial measurement.
· Limit Mark
Two arrows which appear in the center of the TV monitor when the position of the mire ring goes out of the
working range of the auto-tracking. “<LIMIT>” sign appears simultaneously.
· Measurable range over error
Err +o ........................... The spherical power is over the measurable limit of + side.
Err –o ........................... The spherical power is over the measurable limit of – side.
Err co ............................ The cylindrical power is over the measurable limit.
· Min. Pupil Mark
Indicates the minimum pupil size measurable.
A-2
· Near PD
Prospective PD at near, which is calculated by preset near work distance of 35 cm (factory setting).
· Near Work Distance
Distance between the eye and the watching target, when one sees the target through reading glasses or multifocal
glasses.
· PD
Abbreviation of Pupil Distance.
· PS
Abbreviation of Pupil Size.
· Selected AR Value, Selected KM Value
The center value of the measured values which are put in order in the computer.
· SE (Sphere Equivalence) Value
The value to be obtained by adding 1/2 of the cylinder value to the spherical value. The value is calculated for
selected value (or the latest value when the selected value has not been obtained) and CL conversion value.
· Trial Lens Data
The data where the selected AR value (or the latest value when the selected value has not been obtained) is
examined and indicated by the cylinder mode (cylinder reading direction) which would make the sphere trial
lens have lower power for convenience.
· Vertex Distance
The distance between the corneal vertex to the posterior surface of the spectacle lens.
INDEX
A
AI mode ............................................ 4-8, 4-12
Alignment observation ............................. 10-3
AR, KM Measurments ................................ 4-8
Auto IOL ..................................................... 4-3
Auto-PD measurement ............................. 4-20
Auto-shot Button ........................................ 3-1
Auto-shot ON Mark ............................. 3-5, 4-1
Auto-tracking Button .................................. 3-1
Auto-tracking ON Mark ...................... 3-5, 4-1
Auxiliary Switches ..................................... 3-5
B
Brightness Control ...................................... 3-5
Err co .......................................................... 5-5
Error data ........................................ 4-11, 4-15
Eye Level Marker ....................................... 3-7
Eyeprint............................................... 5-4, 5-5
Eyeprint Switch .......................................... 3-5
F
Focusing Indicator .............................. 3-5, 4-1
Forehead Rest ............................................. 3-7
Fuses ........................................................... 3-7
H
H Control of TV Monitor ........................... 3-7
Highspeed mode ............................... 4-9, 4-13
C
Confidence index ........................................ 5-3
Changing Button ......................................... 3-3
Character Code Table ............................... 6-12
Chart ......................................................... 10-3
Chin Rest .................................................... 3-7
Chin Rest Knob .......................................... 3-7
CL conversion value ................................... 5-4
Cleaning Exterior ........................................ 8-7
Comment .................................................... 5-5
Contrast Control ......................................... 3-5
Cover for Switches ..................................... 3-1
Cross-slide travel ...................................... 10-3
CS Measurement ............................. 4-16, 10-2
CYL + ......................................................... 4-2
CYL - .......................................................... 4-2
CYL ± ......................................................... 4-2
CYL Mode switch ...................................... 3-5
Cylinder Mode Indication ........................... 3-5
I
IC Card System ................................... 3-1, 9-1
Interface .................................................... 10-3
Interface Connector .................................... 3-7
IOL Button .................................................. 3-1
IOL ON Mark ............................................. 4-3
D
Dimensions ............................................... 10-4
Display Panel .............................................. 3-1
DOWN Button ............................................ 3-1
M
Manual PD measurement.......................... 4-20
Measurable range over error ....................... 5-5
Measurement indication ........................... 10-3
Measurement of corneal curvature ........... 10-1
Measurement of refractive power ............. 10-1
Measuring Count ........................................ 3-5
Measuring Hard Contact Lenses ............... 6-13
Measuring time ......................................... 10-2
Measuring Window .................................... 3-7
E
Entering Comments .................................. 6-10
Err +o .......................................................... 5-5
Err -o ........................................................... 5-5
J
Joystick ....................................................... 3-3
K
K mode ....................................................... 4-3
L
Locking Knob .............................................
Labels..........................................................
LED for Corneal Illumination ....................
Limit mark ..................................................
List of Parts for Replacement .....................
3-1
2-7
3-7
4-6
8-7
B-2
Memory Indicator ....................................... 3-3
Min. Pupil Mark ......................................... 3-5
Mire Ring .................................................... 3-5
N
Near PD ...................................................... 5-5
Near work distance ..................................... 5-3
O
Operation Flow ........................................... 4-1
P
Parameter Table .......................................... 6-4
PD Measurements ............................ 4-20, 10-2
PD ERR ...................................................... 4-2
PD Window ................................................ 3-7
Power Inlet .................................................. 3-7
Power source ............................................. 10-3
Power Switch .............................................. 3-1
Preparation for Measurement ..................... 4-1
Print Button................................................. 3-3
Printer ......................................................... 3-1
Printing Measurement Results .................... 5-1
Printout ..................................................... 10-2
PS Measurement .............................. 4-18, 10-2
R
R mode ........................................................
R/K Button ..................................................
Replacing Fuses ..........................................
Replacing Printer Roll ................................
RK mode .....................................................
4-3
3-1
8-4
8-1
4-3
S
SE value ......................................................
Selected AR value ......................................
Selected KM value......................................
Setting Date and Time ................................
Setting Switch .............................................
Start Button .................................................
Symbol Information ....................................
System Setups .............................................
5-3
5-3
5-4
6-9
3-5
3-3
1-2
6-1
T
Target .................................................. 3-5,
Trial lens data .............................................
Troubleshooting Guide ...............................
TV Monitor .................................................
4-1
5-4
7-1
3-1
U
UP Button ................................................... 3-1
V
V Control of TV Monitor ........................... 3-7
Vertex distance ............................................ 5-3
W
When measuring mode is set to
<< R/K >> ...................................... 4-8, 4-12
When not using the auto-tracking
function .......................................... 4-7, 4-12
When the measuring mode is set to
<< K >>........................................ 4-11, 4-15
When the measuring mode is set to
<< R >> ........................................ 4-10, 4-14
When using the auto-tracking
function ............................................ 4-5, 4-8
Working range of auto-tracking ................ 10-3