Ch. 17 the eye - vocab

Question 1

accommodation

Answer 1

adjustment of the eye to focus on objects from far to near

Question 2

anterior chamber

Answer 2

area behind the cornea and in front of the lens and iris

Question 3

aqueous humor

Answer 3

fluid produced by the ciliary body

Question 4

biconvex

Answer 4

2 surfaces that are rounded, elevated and curved evenly

Question 5

choroid

Answer 5

vascular layer of the eye, between the retina and the sclera

Question 6

ciliary body

Answer 6

structure surrounding the lends that connects the iris to the choriod

Question 7

cone

Answer 7

photoreceptor cell in the retina, color and central vision

Question 8

conjunctiva

Answer 8

delicate membrane lining the eyelids and covering the eyeball to the cornea

Question 9

cornea

Answer 9

fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball

Question 10

fovea centralis

Answer 10

tiny pit or depression in the retina; clearest vision

Question 11

fundus of the eye

Answer 11

posterior, inner part of the eye

Question 12

iris

Answer 12

pigmented layer that opens and closes to allow more or less light into the eye

Question 13

lens

Answer 13

transparent, biconvex body behind the pupil of the eye

Question 14

macula

Answer 14

small oval region on the retina near the optic disc

Question 15

optic chiasm

Answer 15

point at which optic nerve fibers cross in the brain

Question 16

optic disc

Answer 16

region at the back of the eye where the optic nerve meets the retina; blind spot of the eye

Question 17

optic nerve

Answer 17

cranial nerve carrying impulses from the retina to the brain

Question 18

pupil

Answer 18

central opening of the eye, surrounded by the iris

Question 19

refraction

Answer 19

bending of light rays by the cornea, lens, and fluids of the eye

Question 20

retina

Answer 20

light sensitive nerve cell layer of the eye

Question 21

rod

Answer 21

photoreceptor cell of the retina for low light vision and peripheral vision

Question 22

sclera

Answer 22

tough, white outer coat of the eyebal

Question 23

thalamus

Answer 23

relay center of the brain

Question 24

vitreous humor

Answer 24

soft, jelly-like material behind the lens in the vitreous chamber