Vocab Flashcards
Accommodation
Normal adjustment of the eye to focus on objects from far to near
Anterior chamber
The area behind the cornea and in front of the lens and iris
Aqueous humor
Fluid produced by the ciliary body and found in anterior chamber
Biconvex
Consisting of two surfaces that are rounded, elevated, and curved evenly; lens of the eye is biconvex
choroid
Middle, vascular layer of the eye, between the retina and the sclera
Ciliary body
Structure surrounding the lens that connects the choroid and iris; controls shape of lens and secretes aqueous humor
Cone
Photoreceptor cell in the retina that transforms light energy into a nerve impulse; responsible for color and central vision
Conjunctiva
Delicate membrane that lines the undersurface of eyelids and covers anterior eyeball
Cornea
Fibrous transparent layer of clear tissue that extends over the anterior portion of eyeball
Fovea centralis
Tiny depression in the retina that is the region of clearest vision
fundus of the eye
Posterior, inner part of the eye
iris
Pigmented layer that opens and closes to allow more or less light into the eye
Lens
Transparent, biconvex body behind the pupil of the eye
Macula
Yellowish region on the retina lateral to and slightly below the optic disc
Optic chiasm
The point at which optic nerve fibers cross in the brain
Optic disc
The region at the back of the eye where the optic nerve meets the retina; blind spot
Optic nerve
Cranial nerve carrying impulses from the retina to the brain
Pupil
Central opening of the eye, surrounded by the iris, through which light rays pass
Refraction
Bending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina
Retina
Light-sensitive nerve cell layer of the eye containing photoreceptor cells
Rod
Photoreceptor cell of retina essential for vision in dim light and for 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
