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23 Cards in this Set

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Normal adjustment of the eye for seeing objects at various distances. The ciliary body adjusts the lense (flattening or rounding it) to change refraction & bring objects into focus on the retina.
anterior chamber
area behind the cornia; in front of the lens and iris. It contains aqueous humor
aqueous humor
fluid produced by the ciliary body and found in the anterior chamber
Having two sides that are rounded, elevated, & curved evenly, like part of a sphere. The lens of the eye is a biconvex body.
middle, vascular layer of the eye, between the retina and sclera
ciliary body
structure on each side of lens that connects the choroid and iris; contorl shape of lens; secretes acqueous humor
photoreceport cell; repsonbile for color and central vision
delicate membrane lining the eylids and covering the anterior portion of the eyeball
Fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball
fovea centralis
tiny pit or depression in teh retina that is the region of the clearest vision
fundus of the eye
posteiror, inner part fo the eye
colored portion of eye
trasnpartant biconvex body behind pupil; its beds light to bring them into focus
yellowish region on the retina below the optic disc; contains the fovea centralis
optic chiasm
point at whih the fibers of the optic nerve cross in the brain (chiasm means crossing)
optic disc
region at the back of the eye where the optic nerve meets the retina. Blinds spot of eye; no rods or cones; insensitive to live
optic nerve
cranial nerve carries impulses from retina to brain (cerebral cortex)
dark opening of the eye, surrounded by the iris, through which light rays pass.
bending of light rays by the cornea, lense, & fluids of the eye to bring rays into focus on the retina. Refract means to break (-fract) back (re-).
light-sensitive nerve cell layer containing phorotreceptor cells (rods and cones)
photoreceptor cell of the reina for vision in dim light and for peripheral vision
tough, white outer coat of eyeball
vitreous humor
soft, jelly-like material behidn the lens; helps maintian the shape of eyeball