Chapter 11 Quiz: Eyes and Ears Flashcards
canthus
where the upper and lower eyelid meet
cilia
eyelashes
iris
the muscular layer surrounding the pupil
lens
curved structure that focuses image
pupil
opening permitting light to enter the eye
malleus
auditory ossicles - small bone of inner ear known as hammer.
optic disk
small region in the eye where the nerve endings of the retina enter the optic nerve
audiological evaluation
measurement of the ability to hear and understand speech sounds based on their pitch and loudness.
hyperopia
farsightedness
nyctalopia
night blindness
esotropia
inward deviation of one eye relative to the other
otalgia
earache
presbycusis
gradual hearing loss of sensorineural hearing that occurs as the body ages
semicircular canals
three canals that help to maintain equilibrium / balance, contain endolymph
tympanometry
use of air pressure in the ear canal to test for disorders of the middle ear
fovea centralis
pit in the middle of the macula. Color vision is best in this region.
Xerophthalmia
dry eye, drying of conjunctiva because tear glands don’t produce enough tears. Associated with aging, or RA
Tinnitus
ringing, buzzing or roaring sound in one or both ears
presbyopia
condition of common changes in the eyes that occur with aging.
iridectomy
surgical removal of a portion of the iris tissue.
subconjunctival hemmorrhage
bleeding between the conjunctiva and sclera
legal blindness
corrected vision is reduced to 20/200 or less
choroid
opaque middle layer of the eyeball that provides blood supply to the entire eye
astigmatism
condition in which the eye does not focus properly because of uneven curvatures of the cornea