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SC 101
Chapter 8 sight through end
14
Biology
Not Applicable
11/12/2012

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Term
protection of the eye
Definition
-socket, eyebrows, eyelid, eyelash
-tears
Term
movement of our eye
Definition
6 extrinsic muscles
Term
retina
Definition
-pigmented layer-like a natural dark room in the eye
-layer of photoreceptors
-layer of nerve cells
Term
rod cells in the eye
Definition
light-dark
rhodopsin-found in carrots->night blindness (absorbs light)
Term
cone cells
Definition
-color-red, blue, and green->color blindness (rare to see no color)
-fovea-the area that produces the clearest vision
Term
layer of nerve cells in the eye
Definition
where optic nerve leaves eye = blind spot
Term
interior of the eye
Definition
chambers of the eye
lens
Term
chambers of the eye
Definition
-anterior chamber-aqueous humor-constantly remade
-posterior chamber-vitreous humor-if some is lost is can't be replaced (holds retina in place)
-glaucoma-to much vitreous humor
Term
lens
Definition
-accomodation-change in lens for close vision
-if focusing on something up close, lens is contracted
Term
problems with vision
Definition
normal vision = image focused on retina
nearsightedness (myopia)
farsightedness (hyperopia)
presbyopia (happens as we get older)
astigmatism
Term
nearsightedness (myopia)
Definition
image focuses in front of retina
Term
farsightedness (hyperopia)
Definition
image focuses 'behind' retina
Term
presbyopia (happens as we get older)
Definition
lens grows hard
Term
astigmatism
Definition
misshapen cornea
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