The flashcards below were created by user
Naheer
on FreezingBlue Flashcards.
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iris
alter size of pupil so can see objects near or far
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pupil
large in low small small in bright light
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cornea
transparent layer that protect the eye; refract light
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lens
transparent disc that adjusts in siz- bends light so it hits fovea in back of retina
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ciliary muscles
sphincter muscles attached to iris that have ciliary fibers attached to lens. control thickness of lens
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______ acts like a reflex but can also be consciously controlled
accomodation
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accomodation
change focal length of lens by changing curvature of eye lens
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choroid
blood supply to eye
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retina
- light sensitive rods and cones
- cones-register color
- rods- black and white
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fovea
densely packed rods and cones
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optic nerve
part of brain; blind spot
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fovea
- contains more rods than cones
- light must hit fovea for full acuity
- sensitive to detail
- projects to rest of retina and bain
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myopia
inability to see far onjects clearly
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hyperopia
inability to see near object clearly
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