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23 Cards in this Set
- Front
- Back
- 3rd side (hint)
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accommodation
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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.
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anterior chamber
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area behind the cornia; 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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None
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biconvex
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Having two sides that are rounded, elevated, & curved evenly, like part of a sphere. The lens of the eye is a biconvex body.
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None
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choroid
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middle, vascular layer of the eye, between the retina and sclera
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ciliary body
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structure on each side of lens that connects the choroid and iris; contorl shape of lens; secretes acqueous humor
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cone
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photoreceport cell; repsonbile for color and central vision
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conjunctiva
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delicate membrane lining the eylids and covering the anterior portion of the 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 teh retina that is the region of the clearest vision
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fundus of the eye
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posteiror, inner part fo the eye
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iris
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colored portion of eye
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lens
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trasnpartant biconvex body behind pupil; its beds light to bring them into focus
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macula
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yellowish region on the retina below the optic disc; contains the fovea centralis
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optic chiasm
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point at whih the fibers of the optic nerve 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. Blinds spot of eye; no rods or cones; insensitive to live
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optic nerve
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cranial nerve carries impulses from retina to brain (cerebral cortex)
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pupil
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dark opening of the eye, surrounded by the iris, through which light rays pass.
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refraction
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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-).
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retina
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light-sensitive nerve cell layer containing phorotreceptor cells (rods and cones)
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rod
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photoreceptor cell of the reina for vision in dim light and for peripheral vision
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sclera
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tough, white outer coat of eyeball
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vitreous humor
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soft, jelly-like material behidn the lens; helps maintian the shape of eyeball
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