Eye
Packet
2019
Name: _______________________
McD
Anatomy of the EYE
1. Labelthe parts of the EYE.
2. Select different colors for all the structures and color the structures on the figure.
3. On a separate sheet of paper, define/describe the functions of the labeled parts.
4. Define aqueous humor, vitreous humor, anterior cavity, and posterior cavity.
20.
Muscles of the EYE
1. Label the muscles of the EYE.
2, Color each muscle a different color.
3, On a separate sheet of paper, indicate the eye movement caused by each muscle.
1.
2o
Optic nerve
Corrlÿa
e
S.
4.
'
Function of Eye Structures
1. Tarsal Plate –
2. Tarsal Glands –
3. Conjunctiva –
4. Ciliary Body –
5. Lens –
6. Aqueous Humor (Anterior Chamber) –
7. Cornea –
8. Pupil 9. Iris –
10. Posterior Chamber 11. Canal of Schlemm –
12. Suspensory ligament –
13. Sclera –
14. Ora serrata –
15. Choroid –
16. Retina –
17. Fovea –
18. Macula lutea –
19. Optic disc –
20. Optic nerve –
21. Vitreous Chamber –
Eye Muscles
1. Superior Oblique
2. Superior rectus
3. Medial rectus
4. Lateral rectus
5. Inferior rectus
6. Inferior oblique
Name _______________
The Eye and Vision: p. 283
The Eye
1. The light enters through which opening?
2. The size of this opening is regulated by what?
3. What happens in close vision or bright light?
4. What happens in distant vision or dim light?
Color Vision: p. 283-285
10. What layer of the eye contains rods and
cones?
11. Rods and cones are considered what type of
neurons?
12. Label and Color the following diagram.
blood vessels
(red/blue)
choroid
(purple)
optic disk
(black)
optic nerve
(bracket- green)
retina
(bracket - orange)
sclera
(white!)
cones
photoreceptors
rods
retina
(any bright color)
(bracket-yellow)
(gray)
(bracket - orange)
LE
13. Electrical signals pass from photoreceptors to leave the retina via the optic nerve as
_________________ ________________.
14. What is the “blind spot”?
15. Are the rods and cones evenly distributed in the retina?
16. Where are the rods found?
17. What type of vision are rods responsible for?
18. What type of vision are cones responsible for?
19. Where are cones concentrated?
20. If I wanted to critically view something, where would my eye be focusing that
image?
(Circle One)
21. Which are most sensitive to dim light, rods or cones?
22. Which do not recognize colors, rods or cones?
23. Which are most sensitive to bright light, rods or cones?
24. Which recognize colors, rods or cones?
25. Does the human eye contain more rods or cones? (HINT: Look back at the picture.)
26. How many varieties of cones are there?
27. Each type is most sensitive to particular _______________ of visible light.
28. List the colors of visible light. (Remember ROY G BIV)
29. When do we see white?
Pathway of Light through the eye: p.287-89
30. What is refraction?
31. What are the four refractive media of the eyes? (Think: What does the light pass
through to get to the retina at the back of the eye?)
32. Which one of the media is not constant and can be changed?
33. What is accomodation?
34. Could you have a loss of accomodation? Explain. (Hint: your parents might
have to hold things out in front of them to read it).
33. Explain why close work can cause eye strain. (p.264)
Lenses affect the behavior of light similar to the way
prisms do.
A double concave lens is thicker at the edge
than in the middle and acts like two prisms placed apex to
apex.
Concave lenses are called diverging lenses because
the rays move apart after passing through the lens.
A
double convex lens is thicker at the center than at the
edge and acts like two prisms placed base to base. Convex
lenses are called converging lenses because the rays
eventually meet at a single focal point. The focal length
of a lens is the distance from the center of the lens to
the focal point. Because the light rays cross at the focal
point, the image produced by a convex lens is inverted.
36. Explain why concave lenses are also called diverging lenses?
37. Explain why convex lenses are also called converging lenses?
38. Label each of the following lenses as CONCAVE or CONVEX
Imbalances
Myopia/Hyperopia/Astigmatism: p. 289
39. Under each of the following:
a. type of condition (myopia or hyperopia)
b. common names (farsighted or nearsighted)
c. name and DRAW the type of lens used to correct each problem (concave or convex)
40. What is astigmatism and how is it corrected?
Cataracts/Glaucoma: p. 286
41. Cataracts
a. What is it?
b. Treatment or Cure?
42. Glaucoma
a. What is it?
b. Treatment/Cure?