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chapter 12 & 13

objectives for test

PHOTORECEPTORS= detect changes in light
RETINA= contain photoreceptors/innermost layer of eyeball
CHOROIDS= middle layer of eye,great blood supply
SCLERA= white of eye,continues as dura matter
FOVEA CETALIS= contains all cones
MACULSA LUTEA= contains fovea centralis,contains mosly cones
LACRIMAL GLAND= superior-lateral side of eye,produces tears
IRIS= colored part of eye
LENS= changes shape,(rounder bulges) light waves bend @ a sharper image
PUPIL= hole in the middle of iris,where light enters the eye
AQUEOUS HUMOR= fluid in the anterior cavity,between the lens and cornea
VITREOUS HUMOR= fluid in posterior cavity,helps keep shape of the eyeball(between the lens and retina)
CORNEA= avascular,no blood supply,continues w/sclera/most anterior part of cornea
CILLARY= intrinsic eye muscles
CONJUNCTIVA= membrane that covers outside of eyeball-except the cornea(pink-eye)
CATARACT= clouding of the lens
CERUMEN= ear wax
CLAUCOMA= increases pressure in the eye (aqueous humor does not drain)
REFRACTION= bending of light waves
BLIND SPOT= optic disc (where the opti nerve leaves the eyeball)
MYOPIA= nearsightedness(focus in front of the retina)
HYPEROPIA= farsightedness(focus in back of retina)
ASTIGMATISM= cornea is misshaped
ORGAN OF CORTI= receptors for hearing
MYDRIASIS= sympathetic stimulation
OPTIC DISC= blind spot,no rods or cones(optic nerve meets the eyeball)
Created by: T..Doyle