|Transparent front segment of the eye that covers iris, pupil, and anterior chamber, and provides most of an eye's optical power.|
|Variable-sized, circular opening in center of iris; it appears as a |
black circle and it regulates amount of light that enters the eye.
|Pigmented tissue lying behind cornea that (1) gives color to eye, and (2) controls amount of light entering eye by varying size of black pupillary opening; separates the anterior chamber from the posterior chamber.|
|Natural lens of eye; transparent intraocular tissue that helps bring rays of light to focus on the retina.|
|Part of the eye that converts images into electrical impulses sent|
along the optic nerve for transmission back to the brain. It consists of many named layers that include rods and cones.
|Small, specialized central area of the retina responsible for acute|
|Transparent, colorless, gelatinous mass; fills rear two-thirds |
of the interior of the eyeball, between the lens and the retina.
|Largest sensory nerve of eye; carries impulses for sight from |
retina to brain.
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