CH 17 EYE EAR PATHO Flashcards
defective curvature of the cornea or lens of the eye
astigmatism
farsightedness
hyperopia
farisghtedness
hypermetropia
nearsightedness
myopia
impairment of vision as a result of old age
presbyopia
clouding of the lens, causing decreased vision
cataract
small, hard, cystic mass (glanuloma) on the eyelid
chalazion
disease of the retina caused by diabetes mellitus
diabetic retinopathy
fluid leaks from blood vessels into the retina and vision is blurred
macular edema
fluid leaking from the blood appear in the retina as yellow/white spots
exudates
increased intraocular pressure results in damage to the retina and optic nerve with loss of vision
glaucoma
laser therapy for chronic, open-angle glaucoma which causes scarring in the drainage angle, improving aqueous humor outflow to reduce intraocular pressure
trabeculoplasty
two types of lasers for trabeculoplasty
ALT and SLT (ARGON/SELECTIVE LASER TREATMENT)
inflammation of the eyelid causing redness crusting and swelling along the lid margins
blepharitis
granuloma formed around an inflamed sebaceous gland
chalazion
blockage, inflammation and infection of a nasolacrimal duct and lacrimal sac, causing redness and swelling in the region between the nose and the lower lid
dacrocystitis
outward sagging and eversion of the eyelid, leading to improper lacrimation and corneal drying and ulceration
ectropion
small, superficial white nodule along lid margin due to infection of a sebaceous gland
hordeolum/stye
dropping of the upper lid margin from neuromuscular problems or trauma
ptosis
raised yellowish plaque on eyelid caused by lipid disorder
xanthelasma
localized, purulent, inflammatory staphylococcal infection of a sebaceous oil-producing gland in the eryelid
hordoleum/stye or sty
progressive damage to the macula of the retina
macular degeneration
repetitive rhythmic movements of one or both eyes
nystagmus
two layers of the retina separate from each other
retinal detachment
bright flashes of light
photopsia
black spots or filmy shapes
floaters
abnormal deviation of the eye
strabismus
eye turns inward
esotropia cross eyed
eye turns outward
exotropia
eye turns downward
hypotropia
eye turns upward
hypertropia
making pinpoint burns to form scar tissue and seal holes
photocoagulation
freezer burn that forms a scar and knits a tear together for small retinal tears
cryotherapy
for larger retinal detachments, a buckle made of silicone is sutured to the sclera directly over the detached portion of the retina to push the two retinal layers together
sclera buckle
partial loss of vision from lazy eye
amblyopia
develops when a strabismus develops in an adult
diplopia/double vision
vitreous gel shrinks and pulls on its attachment to the retina
macular hole
surgery to remove a portion of vitreous and replace it with a bubble containing gas and air to hold the macular hole in place as it heals
vitrectomy
intravenous injection of flourescein (a dye) followed by serial photographs of the retina through dilated pupils
flourescein angiography
visual examination of the interior of the eye
opthalmoscopy
non-invasive imaging technique using light waves to take cross-sectional pictures of the retina
optical coherence tomography OCT
examination of anterior ocular structures under microscopic maginification
slit lamp microscopy
intraocular pressure to detect glaucoma
tonometry
clarity of vision is assessed
visual acuity test
distance vision chart
snellen chart
measurement of the entire scope of vision, peripheral and central
visual field test
direct opthalmoscopy
also gives sight of the fundus
removal of the entire eyeball
enucleation
surgical repair of the cornea
keratoplasty
intense, precisely focused light beam creates an inflammatory reaction that seals retinal tears and leaky retinal blood vessels
laser photocoagulation
use of an excimer laser to correct errors of refraction (myopia, hyperopia, astigmatism)
LASIK laser in situ keratomileusis
cataract removal surgery in which ultrasonic vibrations break up the lens; pieces are then aspirated through the ultrasonic probe
phacoemulsification
suture of a silicone band to the sclera over a detached portion of the retina
scleral buckle
an outpatient surgical alternative for selected retinal detachment and scleral buckle. a gas bubble is injected into the middle of the eye, and the tear is sealed with a freezing probe or laser beam
pneumatic retinopexy
removal of the vitreous humor
vitrectomy
benign tumor arising from the acoustic vestibulocochlear nerve (eighth cranial nerve) in the brain
acoustic neuroma
collection of skin cells and cholesterol in a sac within the middle ear
cholesteotoma
loss of ability to hear
deafness
sensorineural hearing loss results from impairment of the cochlea or auditory nerve
nerve deafness
results from the impairment of sound wave transmission from the external ear to the cochlea
conductive deafness
disorder of the labyrinth of the inner ear; elevated endolymph pressure within the cochlea and semicircular canals (cochlear hydrops and vestibular hydrops)
Meniere disease
inflammation of the middle ear
otitis media
inflammation of the middle ear with pus
suppurative otitis media
noninfectious inflammation of the middle ear with accumulation of serous fluid
serous otitis media
hardening of the bony tissue of the middle ear
otosclerosis
stiffening of the stapes bone
ankylosis
(opened) using a laser
fenestrated
sensation of noises in the ears without an external source
tinnitus
sensation of irregular or whirling motion either of oneself or of external objects
vertigo
sudden onset with a short duration
paroxysmal
calcium crystals moving around loose in the vestibule of the inner ear
otoconia
BPPV
benign paroxysmal positional vertigo
testing the sense of hearing
audiometry
an electrical device that delivers acoustic stimuli of specific frequencies and decibels to determine a patients hearing level for each frequency
audiometer
result of an audiometry test with an audiometer
audiogram
surgical insertion of a device that allows sensorineural hearing impaired persons to understand speech
cochlear implant procedure
measurement of the temperature of the tympanic membrane by detection of infrared radiation from the eardrum
ear thermometry
visual examination of the ear canal with an otoscope
otoscopy
test of ear conduction using a vibration source such as a tuning fork
tuning fork test
vibrating fork against the patient’s mastoid bone and in front of the auditory meatus to assess bone cunduction and air conduction
Rinne test
the tuning fork is placed on the center of the forehead
Weber test