The Eye

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The Eye
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Parts of the Eye

• Cornea Clear tissue through which light enters
  the eye.

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• Sclera The white part of the eye
• Aqueous Humor Clear fluid between the cornea
  and the lens
• Pupil Opening in the eye

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• Iris The circular structure containing muscles
  that surround the pupil and changes the amount of
  light entering the eye. It also give your eyes
  their color

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• Lens focuses light onto the retina
• Ciliary muscles changes the shape of the lens
  for near or far vision
• Vitreous humor A clear fluid between the lens
  and the retina that fills out the eyeball and
  gives it shape

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• Retina A layer of light sensitive cells called
  photoreceptors (rods and cones)
• Rods Photoreceptor nerve cells that detect only
  black, white and shades of gray.
• Cones Photoreceptor nerve cells that detect
  color

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http//www.stlukeseye.com/anatomy/Retina.asp
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• Choroid a sheet of cells containing the black
  melanin pigment and blood vessels that nourish
  the retina
• Optic nerve carries the visual image (nerve
  impulses) to the brain

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• Tapetum Bluish black layer that reflects light
  back out the pupil in some animals.