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Chapter 12

Anatomy

Eye StructureFunction
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
Created by: slccsat