Chapter 15 Flashcards
achromatopsia
complete color blindess
chalazion
tumor of the eyelid
exotropia
outward deviation of the eye
nyctalopia
inability to see well in dim light
tinnitus
perception of ringing in the ears with no external stimuli
amblyopia
“lazy-eye” syndrome
diopter
measure of refractive errors
gonioscope
instrument for examining the angle of the anterior chamber of the eye
otitis externa
infection of the external auditory canal
tonometer
instrument that measures the internal pressure of the eye
anacusis
complete deafness
enucleation
removal of the eye from orbit
Meinere disease
disorder of the labyrinth that leads to progressive hearing loss
retinoblastoma
neoplastic disease of the eye found primarily in children
vertigo
feeling of dizziness or spinning
cataract
opacity that forms on the lens and impairs vision
epiphora
abnormal overflow of tears
neovascular
refers to the wet form of macular degeneration
strabismus
a condition in which one eye is misaligned with the other eye; also called heterotropia
visual field
area in which objects are seen when the eye is in a fixed position
caloric stimulation test
test that uses different water temperatures to assess the vestibular portion of the nerve of the inner ear to determine if nerve damage is the cause of vertigo
ophthalmoscopy
visual examination of the interior of the eye
cochlear implant
artificial device that produces hearing sensations by electrically stimulating nerves inside the inner ear; also called bionic ear
fluorescein angiography
assesses blood vessels and their leakage and retinal circulation using a colored dye while photographs are taken
otoplasty
corrective surgery for large, small, or deformed ears/pinna
mydriatics
agents that dilate the pupils and paralyze the eye muscles of accommodation
tonometry
evaluation of intraocular pressure by measuring the resistance of the eyeball to indentation by applied force; used to detect glaucoma
visual acuity test
determines the smallest letters that can be read on a standardized chart at 20 ft
evisceration
removal of the contents of the eyeball, leaving the sclera and cornea
antiemetics
treat and prevent nausea, vomiting, dizziness, and vertigo
wax emulsifiers
loosen and help remove impacted cerumen
enucleation
removal of the entire eyeball from its orbit
ST
esotropia
ophthalmic decongestants
constrict small arterioles of the eye to decrease redness and conjunctival congestion
XT
exotropia
gonioscopy
visual examination of the angle of the anterior chamber of the eye; determine mobility and diagnose glaucoma
otoscopy
visual examination of the external auditory canal
audiometry
measurement of hearing acuity at various frequencies
radial keratotomy
surgical treatment of nearsightedness that uses small incisions to flatten the cornea
otic analgesics
provide temporary relief from earache
ophthalmology
medical specialty concerned with disorders of the eye
otolaryngology
medical specialty concerned with disorders of the ear, nose, and throat
audiologists
allied health-care professionals who work with patients with hearing, balance, and related problems
VA
visual acuity
VF
visual field
ametropia
an error of refraction (exists when light rays fail to focus sharply on the retina)