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Chapters 15 A Class Notes
BSC 2085
Fall 2010
Name__________________________________________
Date ______________________
_____________ of all sensory receptors are in the eye. Nearly ____________ of the cerebral cortex
is involved in processing visual information.
The adult eye is about ________________ in diameter, and only the anterior ___________ is visible.
Please name 5 Accessory Structures to the Eye:
The Eyelid is also called the _______________________.
separates the eyelids.
The ___________________________
The ___________________________ is an elevation at medial commissure,
and it contains oil and sweat glands that make a whitish oily secretion (not tears).
The _____________________ are the internal supporting connective tissue sheet of the eyelid.
The _____________________________________ gives the upper eyelid mobility, and it opens the
eyelid.
The _______________________________ closes the eye when it contracts.
The ____________________________ of the _________________ are richly innervated by nerve
endings that initiate reflex blinking.
Please name 3 types of lubricating glands associated with the Eyelid:
The conjunctiva is a __________________ membrane; the ____________________ conjunctiva
lines the eyelids and the _______________conjunctiva covers the white of the eyes. The
________________________________ is where contact lenses fit into the eye and medications are
often administered at its _______________ recess.
Tears are secreted by the ____________________________. Tears __________________________
the eye surface as they____________________________ it.
Tears are dilute saline solution
containing ___________________, ________________________ and ___________________________
(an enzyme that destroys bacteria).
Tears enter paired lacrimal ___________________ via the lacrimal ______________, and tears
drain into the _____________________ duct. While enhanced tearing washes away substances
___________________ the eye, the importance of ___________________ tears is poorly understood.
Six strap-like ______________________________muscles ___________________ from the
__________________________ of the bony orbit and ______________ into the outer surface of the
eye. These muscles enable the eye to _____________________________________.
Please name the 6 Extrinsic eye muscles:
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The ______________________________ muscle passes through the ___________________ before
inserting into the superior lateral aspect of the eye.
Please Label the Figure below:
What are the 3 Layers of the Eyeball?
The internal cavity of the eye is filled with fluids called ____________________.
The ________________ separates the internal cavity into anterior and posterior segments.
What are the 2 regions of the Fibrous Layer?
The _______________ is avascular and bends light as it enters the eye.
The _________________ is the only tissue in the body that can be transplanted to another person
with _______________________________________ .
The Vascular Layer, also called the ___________________ is the ________________________ layer.
The ________________________ supplies __________________to all layers of the eyeball. It
contains a _____________________ that absorbs light to prevent “visual confusion.”
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What are the 3 parts of the Ciliary Body?
The ________________ is the colored part of the eye, and although ___________ come in different
colors, they only contain ___________________ pigment. The ________________ is the central
opening of the iris that regulates the _________________________ entering the eye.
For close vision and in bright light ____________________________ (__________________ muscles)
contract and pupils constrict. For distant vision and in dim light ___________________
(______________ muscles) contract and pupils dilate. Pupils ____________________ when the
subject matter is appealing or requires problem-solving skills.
What are the 2 Layers of the Retina?
The ____________________ of the Retina contains _______________________ that transduce light
energy. What does transduce mean?
Please name the 5 types of neural cells found in the Retina.
Please Label the Figure below:
The Optic Disc creates a __________________________ where there are no
____________________________________ and vision is not possible. What “fills in” the blind
spot?
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The ___________________ are numerous at peripheral region of retina, away from the
__________________________. The _______________ operate in ______________light, and provide
indistinct, ____________________ peripheral vision. The _________________________ are found
in the and macula lutea and concentrated in the _____________________ . The _______________
operate in ____________________ and provide ___________________________________ vision.
What are the 2 sources of blood supply to the Retina?
The lens and __________________________________separate the anterior and posterior segments.
The posterior segment contains _____________________________ that _________________ light
and contributes to ____________________________________. The anterior segment contains the
__________________________ which is a _________________________________ fluid that is
filtered from the capillaries of the ___________________________; it drains via the
________________________ (canal of Schlemm) and supplies nutrients and oxygen to the lens,
cornea and retina.
_________________________ results from compression of the retina and optic nerve if drainage of
the aqueous humor is blocked, and the eventual result is _________________.
Please Label the Figure below:
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