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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 |