Saturday, March 19, 2011

eyes?

EXTERNAL
  • orbit- houses and protects the eyeball
  • lacrimal apparatus- stores tears
  • lacrimal gland-transports tears
  • conjunctiva-lines the exposed surface of the eyeball
INTERNAL
  • aqeous humor-bathes the iris, pupil and lens
  • vitreous humor- occupies the entire eye cavity behind the lens
  • eyeball
  1. sclera- contains the cornea- allows light to pass through
  2. choroid-contains iris-is a sphincter-contains pupil- the opening
  3. retina- contains rods- active in dim light- contains cones-activ in bright light-contains the lens- controlled by the ciliary muscle

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