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24 Cards in this Set
- Front
- Back
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Accommodation
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Normal adjustment of the eye to focus on objects from far to near.
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Anterior Chamber
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Area behind the cornea and in front of the lens and iris. It contains aqueous humor.
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Aqueous Humor
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fluid produced by the ciliary body and found in the anterior chamber |
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Biconvex |
consisting of two surface that are rounded, elevated, and curved evenly like part of the sphere |
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Choroid
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Middle, vascular layer of the eye, between the retina and the sclera
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CILIARY BODY
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Structure surrounding the lens that connects the choroid and iris.
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Cone
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Photoreceptor cell in the retina that transforms light energy into a nerve impulse. Cones are responsible for color and central vision.
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CONJUNCTIVA
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Delicate membrane lining the undersurface of the eyelids and covering the anterior eyeball.
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CORNEA
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Fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball.
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FOVEA CENTRALIS
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Tiny pit or depression in the retina that is the region of clearest vision.
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FUNDUS OF THE EYE
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Posterior, inner part of the eye.
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IRIS
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Pigmented layer that opens and closes to allow more or less light into the eye.
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LENS
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Transparent, biconvex body behind the pupil of the eye. It bends (refracts) light rays to bring them into focus on the retina.
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MACULA
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Yellowish region on the retina lateral to and slightly below the optic disc; contains the fovea centralis, which is the area of clearest vision.
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OPTIC CHIASM
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Point at which optic nerve fibers cross in the brain (chiasm means crossing).
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OPTIC DISC
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Region at the back of the eye where the optic nerve meets the retina.
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OPTIC NERVE
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Cranial nerve carrying impulses from the retina to the brain (cerebral cortex
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PUPIL
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Central opening of the eye, surrounded by the iris, through which light rays pass. It appears dark.
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REFRACTION
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Bending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina. Refract means to break (-fract) back (re-).
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RETINA
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Light-sensitive nerve cell layer of the eye containing photoreceptor cells (rods and cones).
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ROD
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Photoreceptor cell of the retina essential for vision in dim light and for peripheral vision.
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SCLERA |
white portion of the eye |
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THALAMUS
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Relay center of the brain. Optic nerve fibers pass through the thalamus on their way to the cerebral cortex
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VITREOUS HUMOR |
it helps maintain the shape of the eyeball |
