anatomy final - vision

Question 0

Accommodation

Answer 0

Rounding of lens for near vision

Question 1

Refraction

Answer 1

Bending of light rays (necessary for focus) from air, cornea, aqueous humor, lens, vitreous humor.

Question 2

Myopia

Answer 2

Nearsightedness - eyeball is too long, so image focuses in front of fovea.

Question 3

Hyperopia

Answer 3

Farsightedness - eyeball is too short and image focuses behind fovea.

Question 4

Presbyopia

Answer 4

Failure of lens to accommodate. Lens remains flat for far vision. It loses elasticity. This is what happens for old farts.

Question 5

Constriction of pupil

Answer 5

Improves depth of field.

Question 6

Convergence

Answer 6

Focusing both eyes on same object. Improves depth perception.

Question 7

Rods

Answer 7

Photoreceptors for dim, black and white vision. Located all over retina except fovea.

Question 8

Dark adaptation

Answer 8

Adjustment to change from bright light to dim light.

Question 9

Cones

Answer 9

Photoreceptors for detailed color vision. Most concentrated in macula lutea.

Question 10

Light adaptation.

Answer 10

Adjustment to change from darkness to light.