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MT Chapter 17

Sense Organs

aque/o water
blephar/o eyelid
conjunctiv/o conjunctiva
cor/o pupil
corne/o cornea
cycl/o ciliary body or muscle of the eye
dacry/o tears, tear duct
ir/o, irid/o iris
kerat/o cornea
lacrim/o tears
ocul/o, ophthalm/o eye
opt/o, optic/o eye, vision
palpebr/o eyelid
papill/o optic disc, nipple-like
phac/o, phak/o lens of the eye
pupill/o pupil
retin/o retina
scler/o sclera (white of the eye), hard
uve/o uvea, vascular layer of the eye
vitre/o glassy
ambly/o dull, dim
dipl/o double
glauc/o gray
mi/o smaller, less
mydr/o widen, enlarge
nyct/o night
phot/o light
presby/o old age
scot/o darkness
xer/o dry
-opia, -opsia vision
-tropia to burn
acous/o hearing
audi/o the sense of hearing
audit/o hearing
aur/o, auricul/o ear
cochle/o cochlea
mastoid/o mastoid process
myring/o eardrum, tympanic membrane
ossicul/o ossicle
ot/o ear
salping/o eustachian tube, auditory tube
staped/o stapes (3rd bone in middle ear)
tympan/o eardrum, tympanic membrane
vestibul/o vestibule
-acusis, -cusis hearing
-meter instrument to measure
-otia ear condition
AD right ear
AOM acute otitis media
AS left ear
EENT Eyes, Ear, Nose, Throat
ENG electronystagmagraphy (test of the balance mechanism of the inner ear)
ENT Ears, Nose, Throat
ETD eustachian tube dysfunction
HEENT Head, Eyes, Ears, Nose, Throat
PE Tube Pressure-equalizing tube
SOM serous otitis media
AMD age-related mucular degeneration
IOL intraocular lens
IOP intraocular pressure
LASIK laser in situ keratomileusis
OD right eye
OS left eye
OU both eyes
PERRLA Pupils equal round reactive to light accommodation
POAG Primary open-angle glaucoma
PRK photorefractive keratectomy
VA visual acuity
VF visual field
accommodation Normal adjustment of the eye to focus on objects from far to near.
anterior chamber area behind the cornea and in front of the iris. Contains aqueous humor.
aqueous humor Fluid produced by the ciliary body and found in the anterior chamber
biconvex consisting of two surfaces that are round, elevated and curved evenly like part of a sphere.
choroid Middle vascular layer of the eye, between the retina and the sclera.
ciliary body structure surrounding the lens that connects the choroid and iris. Controls the shape of the lens.
cone photoreceptor cell in the retina that transforms light energy into a nerve impulse. responsible for color and central vision.
conjunctive Delicate membrane lining the undersurface of the eyelid and covering the anterior eyeball
cornea Fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball.
fovea centralis tiny pit of depression in the retina that is the region of clearest vision
fundus of the eye Posterior, inner part of the eye
iris Pigmented layer that opens and closes to allow more or less light into the eye. The central opening of the iris is the pupil
lens transparent, biconvex body behind the pupil of the eye. Bends to refract light rays.
macula yellowish region on the retina lateral to and slightly below the optic disc
optic chiasm point at which optic nerve fibers cross in the brain.
optic disc region at the back of the eye where the optic nerve meets the retina. Blind spot.
optic nerve cranial nerve carrying impulses from the retina to the brain
pupil central opening of the eye.
refraction bending of light rays by the cornea, lens, and fluids of the eye to bring rays into focus on the retina
retina light sensitive nerve cell layer of the eye containing photoreceptors cells (rods and cones)
rod Photoreceptor cell of the retina essential for vision in dim light and for peripheral vision
sclera tough, white outer coat of the eyeball
thalamus relay center of the brain.
vitreous humor soft, jelly-like material behind the lens in the virtreous chamber, helps maintain the shape of the eyeball.
auditory canal channel that leads from the pinna to the eardrum
auditory meatus auditory canal
auditory nerve fibers carry impulses from the inner ear to the brain
auditory tube channel between the middle ear and the nasopharynx
auricle Flap of the ear
cerumen waxy substance secreted by the external ear, earwax
cochlea snail-shaped spirally wound tube in the inner ear
endolymph fluid within the labyrinth of the inner ear
eustachian tube auditory tube
incus second bone of the middle ear, anvil
labyrinth maze-like series of canals of the inner ear, includes the cochlea, vestibule, and semicircular canals
malleus first bone of the middle ear, hammer
organ of Corti sensitive auditory receptor area found in the cochlea of the inner ear
ossicle small bone of the ear
oval window membrane between the middle ear and the inner ear
perilymph fluid contained in the labyrinth of the inner ear
pinna auricle; flap of the ear
semicircular canals passages in the inner ear associated with maintaining equilibrium
stapes third bone of the middle ear. Stirrup
tympanic membrane membrane between the outer and the middle ear, eardrum
vestibule central cavity of the labyrinth. help to maintain equilibrium
audiometry testing the sense of hearing
cochlear implant surgical insertion of a device that allows sensorineural hearing
ear themometry measurement of temperature
otoscopy visual examination of the ear canal
tuning for test test of ear conducting using vibration source
acoustic neuroma benign tumor arising from the acoustic vestibulocochlear nerve
cholesteatoma collection of skin cells and cholesterol in a sac within the middle ear
deafness loss of the ability to hear
Meniere disease disorder of the labyrinth of the inner ear
otitis meadia inflammation of the middle ear
otosclerosis harding of the bony tissue of the middle ear
tinnitus sensation of moises (ringing, buzzing, whistling, booming) in the ear
vertigo sensation of whirling motion
enucleation removal of the entire eyeball
keratoplasty surgical repair of the cornea
laser photocoagulation intense, precisely focused light beam creates an inflammatory reaction that seals retinal tears and leaky retinal blood
LASIK use of an excimer laser to correct error of refration
phacoemulsification ultrasonic vibrations break up the lens
scleral buckle suture of a silicone band to the sclera over a detached portion of the retina
Created by: 713717529