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parts of the eye

Iris

Flat, colored, ring shaped membrane behind cornea

Cornea

The clear tissue that covers the front of the eye

Pupil

Dark circular opening at center of iris, varying in size to regulate how much light reaches retnia

Retina

the light-sensitive membrane covering the back wall of the eyeball

Choroid

vascular layer beneath the sclera that provides nourishment to the outer portion of the retina

Opitic nerve

the bundle of cells that carry neural message from eye to brain

Sclera

'white outermost layer of the eye provides strength, shape, and structure

Lens

the flexible piece of tissue that helps focus light toward the back of the eye, behind iris

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