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Eyeball Terms
Eyeball Terms
10
Anatomy
Undergraduate 3
02/02/2010

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Term
nearsightedness
Definition
difficulty seeing far
steep cornea-focuses on rays of light in FRONT of retina
Term
farsightedness
Definition
difficulty seeing near
flat cornea-focuses on rays of light BEHIND retina
Term
astigmastism
Definition
blurred vision at any distance
cornea is lopsided
Term
presbyopia
Definition
loss of near vision from aging of the lens
Term
cataracts
Definition
clouding of lens,sensitivity to light,difficulty reading,loss of color perception,loss of depth perception,night blindness
Term
glaucoma
(angle closure)
(acute)
Definition
tunnel vision-slow loss of peripheral,eventual blindness

production rate of aqueous humor is greater than drainage rate of aqueous humor

angle closure-lens grows to the point of closing the chamber angle

acute-rapid rise in pressure
Term
macular degeneration
Definition
blurred and distorted central vision,blind spots and loss of color vision

treatment-insertion of telescope
Term
conjunctiva
Definition
loose filmy tissue covering eyeball;almost completely transparent,turns red when eye is inflamed (red eye)
Term
refractive lens exchange
Definition
insertion of an artificial lens that can correct nearsightedness,farsightedness,astigmatism,and presbyopia
Term
diabetic retinopathy
Definition
abnormal blood vessels grow in response to low oxygen tension in the tissue
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