Chapter 17 Vocabulary - The Eye

Question 1

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

Answer 1

Accommodation

Question 2

Area behind the cornea and in front of the lens and iris; contains the aqueous humor.

Answer 2

Anterior Chamber

Question 3

Fluid produced by the ciliary body and found in the anterior chamber.

Answer 3

Aqueous Humor

Question 4

Consisting of two surfaces that are rounded, elevated, and curved evenly, like part of a sphere. The lens of the eye is a biconvex body.

Answer 4

Biconvex

Question 5

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

Answer 5

Choroid

Question 6

Structure surrounding the lens that connected the iris to the choroid. Contains ciliary muscles, which control the shape of the lens, and it secrete aqueous humor.

Answer 6

Ciliary Body

Question 7

Photoreceptor cell in the retina that transforms light energy into a nerve impulse. Responsible for color and central vision.

Answer 7

Cone

Question 8

Delicate membrane lining the eyelids and covering the eyeball up to the cornea.

Answer 8

Conjunctiva

Question 9

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

Answer 9

Cornea

Question 10

Tiny pit or depression in the retina that is the region of clearest vision.

Answer 10

Fovea Centralis

Question 11

Posterior, inner part of the eye; visualized with an ophthalmoscope.

Answer 11

Fundus of the eye

Question 12

Pigmented (colored) layer that opens and closes to allow more or less light into the eye.

Answer 12

Iris

Question 13

Transparent, becomes body behind the pupil of the eye. It bends (refracts) light rays to bring them into focus on the retina.

Answer 13

Lens

Question 14

Small oval region on the retina near the optic disc; contains the fovea centralis which is the area clearest vision.

Answer 14

Macula

Question 15

Point at which optic nerve fibers cross in the brain.

Answer 15

Optic Chiasm

Question 16

Region at the back of the eye where the optic nerve meets the retina.

Answer 16

Optic disc

Question 17

Cranial nerve carrying impulses from the retina to the brain.

Answer 17

Optic Nerve

Question 18

Central opening of the eye, surrounded by the iris, through which light rays pass. It appears dark.

Answer 18

Pupil

Question 19

Bending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina.

Answer 19

Refraction

Question 20

Light-sensitive nerve cell layer of the eye containing photoreceptor cells (rods and cones).

Answer 20

Retina

Question 21

Photoreceptor cell of the retina essential for vision in low light and for peripheral vision.

Answer 21

Rod

Question 22

Tough, white outer coat of the eyeball.

Answer 22

Sclera

Question 23

Relay center of the brain.

Answer 23

Thalamus

Question 24

Soft, jelly-like material behind the lens in the vitreous chamber; helps maintain the shape of the eyeball.

Answer 24

Vitreous Humor