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Anatomy

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