Monday, April 11, 2011

The Eyes


The Eye - are organs that detect light, and convert it to electro-chemical impulses in neurons. The simplest photoreceptors in conscious vision connect light to movement.


Structures of the Eye (External) :


  • Orbit - cone-shaped cavity formed by the skull, the houses and protects the eyeball, padded with fatty tissue, cushiosn and protects the eye from injury

  • Lacrimal apparatus - produces tears

  • Lacrimal gland - transports tears

  • Conjunctiva - protective membrane, lines the exposed surface of the eyeball.

Structures of the Eye (Internal) :
  • Aqueous humor - water humor, bathes the iris, pupil, and lens,
  • Vitreous humor - clear, jelly-like fluid, occupies the entire eye cavity behind the lens

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