Special Senses Flashcards
accomodation
eyes ability to adjust its optical powrs to maintain a clear image of objects
amblyopia
disorder in children caused by eye muscles being weaker in one eye
aqueous humor
front anterior cavity filled with fluid
astimatism
irregularities in curvature of the cornea cause light not to focus
audiology
study of hearing disorders
blepharitis
inflammation of eyelids
blepharoptosis
drooping of eyelid
canthus
corners of eye where the upper eyelids and lower eyelid meet
cataract
clouding over the lens of the eye
cerumen
earwax
choroid
lines sclera and absorbs extra light entering the eye
ciliary body
responsible for holding and moving the lens
cochlea
bony spiral shaped structure that forms inner portion of ear
cones
translates light rays into nerve impulses
conjunctiva
protective mucous membrane lining underside of eyelid
conjunctivitis
an inflammation of conjunctivia
cornea
allows light to enter the eye
corneal abrasion
lesion or abrasion on the cornea
diabetic retinopathy
disease of the retina
diplopia
double vision
ectropion
turning outward of the eyelid
entropion
eyelid turning inward
fundus
floor of tympanic cavity
glaucoma
caused by increase of pressure in eye
hearing loss
full or partial decrease in the ability to detect or hear sounds
hordeolums
inflamed glands of eyelid
hyperopia
farsightedness
hypertensive retinpathy
hypertension
impacted cerumen
earwax that becomes hardened
incus
gone in middle ear shaped like an anvil
insufflation
introduction of gas,vapor of power into a cavity
iris
contains eye color
labrynth
hearing and equilibrium
lacrimal apparatus
produce,store and remove tears
lacrimal canaliculi
ducts at inner corner of eye
lacrimal gland
gland above the outer corner of the eye
lacrimal sac
part of lacrimal duct
lens
colorless structure suspended behind the iris
macula lutea
yellow spot on back of eye
macular degeneration
deterioration of the central portion of retina
malleus
gone in middle ear shaped like a hammer
menieres disease
condition of inner ear
myopia
nearsightedness
nasolacrimal duct
drains lacrimal fluid into nasal cavity
nyctalopia
inability to see well in faint light
nystagmus
involuntary,repetitive movements of eye
optic disk
part of retina where optic nerve enters
optic nerve
carries information from eye to brain
orbit
where the eyeball is housed
ossicles
small bones
otitis media
inflammation of the middle ear caused by bacterial infections
otoslerosis
condition in which the tissue surrounding the bone of stapes grows abnormally around
palpebrae
eyelids
palpebral fissure
opening between eyelids
papilledea
inflammation of optic nerve
photobia
sensitivity to light
pupil
hole in center that controls amount of light entering the eye
presbycusis
healing loss caused by deterioration of sensory receptors
presbyopia
loss of elasticity in the eyes lens, hard to focus eyes up close
refraction
process of light rays changing direction when they pass through the eye
retina
innermost layer of the eye
retinal detachment
separation of retina from choroids layer
rods
photosensitive cells in the retina
semicircular canals
three canals in inner ear that are part of the labrinth
stapes
stirrup shaped ear bone
strabismus
caused by weakness of external eye muscles
tinnitus
ringing in ears associated with hearing loss
tympanic membrane
eardrum
vestibule
middle part of inner ear
vitreous chamber
posterior cavity of eyeball located behind the lens
vitreous humor
thick fluid that fills posterior cavity of eyeball
sclera
white of the eye. outer layer of eyeball