study test sheet chapter17

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25 terms

cornea

fibrous layer of clear tissue that extends over the anterior portion of the eye and is continuous with the white of the eye

macula lutea

yellowish region in te retina; contains the fovea centralis

lens

the eye structure is transparent, biconvex and focuses light on the retina

optic chiasma

place were optic nerve fivers cross in the brain

accommodation

adjustment of the lens by the ciliary body

cones

photosensitive receptor cells of the retina; make the perception of color possible

conjunctivits

pinkeye inflammation

myopia

nearsightedness

astigmatism

defective curvature of the cornea or lens

macular degeneration

loss of central vision

cochlea

snail shaped spirally wound tube in the inner ear

tinnitus

ringing sound in ears

refraction

Bending of light rays by te cornea lens and fluids of the eye

rod

photosensitive make dim light possible

hyperopia

farsighted

aqueous humor

fluid produced by the ciliary body

keratitis

inflammation of the cornea

cataract

clouding of the lens

strabismus

deviation of the eye esotropia and exotropia

pupiledema

swelling in the region of the optic disc

macular degeneration

progressive damage to the yellowish region on the retina (lateral to and slightly below the optic disc

cerumen

waxy substance

my/ring/o/tomy

incision of the eardrum

otosclerosis

hardening of bony tissue in the inner ear; ankylosis of the staper may occur

otolaryngologist

specialist in the study of the ear and voice box

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