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15 Cards in this Set

  • Front
  • Back
SCLERA
1. white of the eye

2. outer layer of eye

3. tought, fibrous,
protective portion of the eye
CORNEA
1. located anteriorly

2. outer layer is transparent and permits light to enter the globe
IRIS
1. circular

2. pigmented

3. muscular structure that gives color to the eye

4. regulates amount of light entering the eye
PUPIL
1. circular opening in middle of iris

2. allows light to enter the eye
LENS
1. transparent, biconvex structure directly behind the iris

2. helps with focusing the eye

3. lens separates the inner eye into anterior and posterior cavities
AQUEOUS HUMOR
1. fluid in front of lens

2. gives cornea its curved shape

3. watery solution which supplies oxygen and nutrients to lens and cornea
VITREOUS HUMOR
1. fluid which helps eye maintain its shape

2. jelly like substance

3. fluid behind lens
RETINA
1. inner layer of eye

2. contains different layers of nerve cells

3. continous with the optic nevrve which carries visual impulses to the brain
RODS
1. structures that respond to low intensity light

2. responsible for night vision
CONES
1. strictures that respond to higher light intensity

2 responsible for daytime vision
FOVEA CENTRALIS
1. small depression near the center of the rtina where cones are densely concentrated.

2. point of best focus and color vision
REFRACTION
1. bending of light rays resulting when light passes through subsance in the eye (aqueous humor, vitreous humor)
ACCOMDATION
increases / decreases its curve to retract light rays into focus
CONSTRICTION
1. controlled by iris

2. regulates amount of light entering eye
INVERSION
1. process which brain interprets images that have passed through the lens

2. lens provide an upside down image on end receptors located in rods and cones

3. ocipital loves of cerebrum recieve and convert them into right-sde simages for view and storeage