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Eye diagram

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Term
Definition
Pupil   Adjustable opening in the center of the eye through which light passes  
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Cornea   The eyes clear, protective layer, covering the pupil and iris  
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Iris   A ring of muscle tissue that forms the colored portion of the eye. Controls the size of the pupil opening  
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Lens   Transparent structure behind the pupil that changes shape to help focus images on the retina  
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Retina   Light sensitive inner surface of the eye containing rods & cones (and neurons); begins processing visual information  
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Fovea   Central focal point in the retina, around which the eye's cones cluster  
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Optic Nerve   Nerve that carries neura; impulses from the eye to the brain  
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Path of light (first)   Cornea  
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Path of light (second)   Pupil  
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Path of light (third)   Lens  
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Path of light (fourth)   Retina  
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Path of light (fith)   Optic Nerve  
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