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specialsense test1
special senses test review wk 1
Question | Answer |
---|---|
conjunctiva | membrane lining the inner surfaces of the eyelids; clear |
cornea | fibrous, transparent tissue that extends over the pupil and iris |
what is the function of the cornea | bend/refract rays of light |
choroid | supply nutrients to the eye; vital part of the eye |
what is known as the uvea of the eye | choroid, iris, ciliary body |
zonules | fine thread like attachments connect the ciliary body and lens; allows eyes to adjust shape and thickness of lens |
accomidation | focus |
aqueous humor | fluid the ciliary body secretes |
what is the function of the aqueous humor | maintains the shape of the anterior eye |
vitreous humor | maintains the shape of the eye, is not constantly reformed |
retina | thin, delicate, sensitive nerve layer of eye; functional part of the eye |
rods | photoreceptors that see black and white |
cones | photoreceptors that see color and bright lights |
how many rods are there | 120 million |
how many cones are there | 6.5 million |
nerve impulses travel from eye to brain using what | optic nerve |
optic disc | where the optic nerve meets the retina |
macula | small, oval, yellowish area adjacent to the optic disc |
fovea centralis | central depression; sharpest vision of the eye |
hemi | half |
an | without |
opsia | vision |
blephar/o | eyelid |
conjunctiv/o | conjunctiva |
corne/o | cornea |
cycl/o | ciliary body |
kerat/o | cornea |
palpebr/o | eyelid |
uve/o | uvea; vascular layer of the eye |
presby/o | old age |
xer/o | dry |
astigmatism | defective curvature of the cornea or lens |
hyperopia | farsightedness |
myopia | nearsightedness |
presbyopia | impairment of vision as result of old age |
glaucoma | increased intraocular pressure results in damage to the retina and optic nerve with loss of vision |
pinna/auricle | projecting part/flap |
tympanic membrane | eardrum |
3 smallest bones in body; ossicle chain | malleus, incus, stapes |
eustachian tube | used to equal the pressure in the middle ear to the environment |
cochlea | snail-shaped structure; how you hear; interperates sound waves |
myco | fungus |
osis | condition of |
vestibular | balance |
rrhea | flow |
dacry/o | tear |
aniscoria | unequal |
meniere disease | disorder of the labyrinth of the inner ear |
otitis media | inflammation of the middle ear (ear infection) |
tinnitus | sensation of noises in the ear |
vertigo | sensation of irregular or whirling motion either of oneself or of external objects |
tonometry | used to measure if a person has glaucoma |
macular degeneration | loss of vision; progressive damage to the macula |
ot/o | ear |
opthal | eye |
ology | study of |
meatus | opening |
cerumen | ear wax |
sclerosis | hardening |
2 types of deafness | conductive/ neurosensory |