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Chapter 12
Anatomy
Eye Structure | Function |
---|---|
cornea | refracts light; important in focusing light onto the retina |
sclera | maintains shape of eye and protects eye; also serves as site of extrinsic muscle attachment |
iris | controls amount of light passing through the pupil |
ciliary body | changes shape of lens (accommodation) and secretes aqueous humor |
choroid | absorbs light; detects light and forms images for transmission to brain |
retina | absorbs light; detects light and forms images for transmission to brain |
lens | refracts light; important in accommodation |
anterior cavity | maintains shape of eye and refracts light through its vitreous humor |
posterior cavity | maintains shape of eye and refracts light through its vitreous humor |
aqueous humor | fills anterior cavity, helping to maintain shape of eye; refracts light; maintains intraocular pressure |
vitreous humor | fills posterior cavity and maintains intraocular pressure; lends shape to eye and keeps retina firmly pressed against choroid; refracts light |