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specialsenses vocab1

Special Senses vocab week 1

accomidation normal adjustment of the eye to focus on objects from far to near
anterior chamber area behind cornea and infront of the lens and iris
aqueos humor fluid produced by ciliary body and found in the anterior chamber
biconvex two surfaces that are rounded, elevated, and curved evenly like a sphere
chamber space
choroid middle, vascular layer of the eye between retina and sclera
ciliary body structure surrounding the lens that conects the choroid and iris
cone photoreceptor cell in retina that transforms light energy into a nerve impulse
conjunctiva delicate membrane lining the undersurface of the eyelids and covering the anterior eyelid
cornea fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball
fovea centralis tiny pit or depresson in the retina that is the region of clearest vision
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 lens, it bends light rays to bring them into focus
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 the back of the eye where optic nerve meets 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 photorecepter cells
rod photorecepter cell of the 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; maintains the shape of eye
Created by: a1h12