31 terms

Sensory Disorders

nearsightedness, light rays focus in front of retina
farsightedness, light rays focus behind retina
unequal curvature of lens
associated with aging, results in difficulty with near vision
pink eye, inflammation of the conjunctiva, contagious
inflammation of the eyelid, caused by excessive dryness and oiliness
stye, acute inflammation of oil or sweat glands of the eyelid
meibomian cyst, accumulation of lipid material from a chronically obstructed meibomian gland in the eyelid
inflammation of the cornea, caused by bacteria, virus, or fungal infections, herpes simplex keratitis most common
increased IOP, occurs after the age of 40 - eye discomfort, reduced peripheral vision (open angle), painful, hard sightless eyes (angle-closure)
opacity or cloudiness of lens - halo around lights
hemorrhage into the anterior chamber, caused by trauma
detached retina
the sensory layer becomes separated from the pigmented layer of the retina - "floaters", definite gaps in vision or blind spots
blind spot
scotoma, place in the optic disk that has no photoreceptors
conductive hearing loss
sound waves to the organs of hearing are disturbed
sensorineural hearing loss
disturbance of the organs in the inner ear or the transmitting nerve
central hearing loss
brains inability to interpret sound after they have been transmitted
functional hearing loss
no organic cause is found, no damage to auditory nerve is visible, stems from an underlying psychological problem
external otitis
inflammation of external ear, swimmers ear
otitis media
inflammation of middle ear, serous, chronic, acute purulent, chronic purulent
bony fixation of the stapes, slow or stops vibrations of stapes = impairs or destroys hearing
a growth that occurs when a tympanic membrane perforation occurs
infection of one of the mastoid bones, usually an extension of a middle ear infection that was untreated
inflammation of the labyrinthine canals of the inner ear, most common cause of vertigo
acoustic neuroma
non-cancerous tumor that develops on the nerve that connects the ear to the brain
fluctuations in the production or reabsorbsion of fluid in the inner ear; there is too much circulating fluid - vertigo, tinnitus
diabetic retinopathy
characterized by capillary microaneurysms, hemorrhage, exudates and formation of new vessels, treatment is photocoagulation
macular degeneration
the damage to the macula that occurs in both eyes, with one eye's vision tending to deteriorate more rapidly. blurred vision is the first symptomatic (dry), distortion of vision; lines become wavy (wet)
open angle glaucoma
familial tendency with onset age 45-65, slow and progressive vision loss, halos, and eye pain, drugs must be taken for life
closed angle glaucoma
rapid onset of decreased vision, halos, and severe eye pain, medical emergency, treated with emergency meds
acute otitis media
inflammation or infection of middle ear, severe throbbing pain behind tympanic membrane, more common in children because of shorter, straighter eustachian tube