Eye disorder flashcards Basic Vocab. #9 flashcards |

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Accommodation

normal adjustment of the eye to FOCUS ON OBJECTS FROM FAR TO NEAR.

Anterior Chamber

area BEHIND CORNEA IN FRONT OF LENS AND IRIS. (contains aqueous humor)

aqueous humor

FLUID produced by the ciliary body. found in the anterior chamber

Biconvex

TWO round, elevated, and curved evenly surfaces. LIKE PART OF A SPHERE.

Choroid

MIDDLE, vascular layer of the eye BETWEEN retina and sclera.

Ciliary Body

STRUCTURE SURROUNDING LENS connects the choroid and iris

Cone

PHOTORECEPTOR CELL in the RETINA that TRANSFORMS LIGHT ENERGY INTO A NERVE IMPULSE. responsible for COLOR and CENTRAL VISION.

Conjunctiva

DELICATE MEMBRANE lining the undersurface of the eyelids

Cornea

Fibrous transparent layer of CLEAR TISSUE THAT EXTENDS OVER ANTERIOR PART OF EYEBALL.

Fovea Centralis

Tiny pit or DEPRESSION IN RETINA that is the region of CLEAREST VISION.

Fundus of the Eye

Posterior, INNER PART OF THE EYE

Iris

Pigmented (colored) layer that opens and closes to ALLOW MORE OR LESS LIGHT INTO THE EYE.

Lens

Transparent, biconvex body BEHIND THE PUPIL. it BENDS LIGHT RAYS TO BRING THEM INTO FOCUS ON THE RETINA

Macula

YELLOWISH REGION ON THE RETINA. lateral to and slightly below the optic disc.

Optic Chiasm

Point at which optic nerve fibers CROSS IN THE BRAIN

Optic Disc

Region at back of the eye where OPTIC NERVE MEETS THE RETINA. (blind spot of the eye b/c it contains only nerve fibers, no rods or cones)

Optic Nerve

CRANIAL NERVE carrying impulses from RETINA to BRAIN

Pupil

CENTRAL OPENING OF EYE.

Refraction

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

Retina

LIGHT SENSITIVE NERVE CELL layer of the eye containing photoreceptor cells (CONES AND RODS)

Rod

PHOTORECEPTOR CELL OF RETINA (essential for vision in dim light and peripheral vision)

Sclera

TOUGH WHITE OUTER COAT of the eyeball.

Thalamus

RELAY CENTER OF THE BRAIN

Vitreous Humor

Soft JELLY-LIKE MATERIAL behind the lens in the vitreous chamber. (helps maintain the shape of the eyeball)

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