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Learning Target: Human Eye Anatomy & Physiology
• I Can… Identify the anatomical structures of a human eye and briefly describe their physiology.
• I Will…• List and describe anatomical structures of the human
eye.• List the associated functions of each structure.• Relate structures to their function.
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Conjunctiva – clear mucus membrane that lines the inner surfaces of the eyelids and covers the front of the eyeball except for the cornea.Lacrimal Gland – secretes tears that keep the exposed surface of the eye moist. Contains lysozyme an enzyme with bactericidal properties.
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Extrinsic Muscles – Movement of the eyeball• 3 pairs
• Strabismus – “Lazy eye”• Phoria – weak eye muscles
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Accommodation: Focusing the eye to see close objects
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Light is focused by cornea and lens on the Fovea centralis (“central pit”) which is in the center of the Macula lutea (“yellow spot”)
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The third refractive component is the length of the eyeball.
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18x Rods to Cones
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We do not “see” with our eyes, but with our brains.
~Unknown