special senses Flashcards
ophthalmology
branch of medicine dealing with the eye
accomodation
change in lens shape to focus at various distances
acuity
sharpness of vision
tonometry
procedure using an instrument to measure intraocular pressure
cranial nerve VIII
acoustic, auditory, or vestibulocochlear- balance and hearing
pannus
inflammation and vascularization of the cornea
epiphora
excessive tear prodiction
proptosis
displacement of the eye from the orbit
enucleation
surgical removal of the eyeball
mydriatics
drugs that dilate the pupil
tapetum lucidium
brightly colored iridescent reflecting layer of the choroid
paplpebrae
eyelids
conjunctiva
the mucous membrane that lines the underside of each eyelid
distichiasis
abnormal condition of a double row of eyelashes , one of which turns against the eyeball resulting in injury
ectropion
eversion of turning outward of the eyelid
panophthalmitis
inflammation of all eye structures
nicitating membrane
third eye; conjunctival fold attached at the medial canthus that moves across the cornea when the eyelids close
nystagmus
involuntary, constant, rhythmic movement of the eyes
rhodopsin
photosensitive chemical in retinol rods derived from vitamin a
fluoroscein
a fluorescing dye
blepharospasm
rapid, involuntary contraction of the eyelid
cochlea
spiral shaped passage that leads from the oval window to the inner ear
otitis externa
inflammation of the outer ear
aqueous humor
the watery fluid that fills the anterior and posterior chambers of the eye
glaucoma
group of disorders resulting from elevated intraocular pressure
canthus
the angle where the uper and lower eyelids meet
floaters
particles suspended in the vitreous fluid that cast shadows on the retina
eustachian tube
narrow duct that leads from the middle ear to the nasopharynx
nuclear sclerosis
drying out of the lens with age
malleus, incus, stapes
the three auditory ossicles of mammals
