Chapter 11 Special Senses The Eyes and Ears Medical Terms Flashcards
a brain tumor that develops adjacent to the cranial nerve running from the brain to the inner ear
acoustic neuroma
dimness of vision or partial loss of sight, especially in one eye, without detectable disease of the eye
amblyopia
any error of refraction in which images do not focus properly on the retina
ametropia
a condition in which the pupils are unequal in size
anisocoria
the loss of absence of mobility in a joint due to disease, injury, or a surgical procedure
ankylosis
a device that transmits, processes, or amplifies sounds, and can be used with or without a hearing aid
assistive listening device
a condition in which the eye does not focus properly because of uneven curvatures of the cornea
astigmatism
the measurement of the ability to hear and understand speech sounds based on their pitch and loudness
audiological evaluation (speech audiometry)
the use of an audiometer to measure hearing acuity
audiometry
pressure-related ear condition
barotrauma
involves both ears
binaural testing
the inability to see
blindness
the loss of transparency of the lens of the eye
cataract
a nodule or cyst, usually on the upper eyelid caused by obstruction of a sebaceous gland
chalazion
destructive epidermal cyst in the middle ear made up of epithelial cells and cholesterol
cholesteatoma (pearly tumor)
a type of glaucoma in which the opening between the cornea and iris narrows so that fluid cannot reach the trabecular meshwork
closed-angle glaucoma (acute glaucoma)
an electronic device that bypasses the damaged portions of the ear and directly stimulates the auditory nerve
cochlear implant
a hearing loss in which sound waves are prevented from passing from the air to the fluid-filled inner ear
conductive hearing loss
inflammation of the conjunctiva, usually caused by an infection or allergy
conjunctivitis (pink eye)
an injury, such as a scratch or irritation to the outer layers of the cornea
corneal abrasion
the surgical replacement of a scarred or diseased cornea with clear corneal tissue from a donor
corneal transplant (keratoplasty)
a pitting of the cornea caused by an infection or injury
corneal ulcer
an exam of how the two eyes work together, used to assess binocular vision
cover test
an inflammation of the lacrimal gland that can be caused by a bacterial, viral, or fungal infection
dacryoadenitis
the complete or partial loss of the ability to hear
deafness
commonly used as the measurement of the loudness of sound
decibel
damage to the retina as a complication of uncontrolled diabetes
diabetic retinopathy
the perception of two images on a single object
diplopia (double vision)
tiny ventilating tubes placed through the eardrum to provide ongoing drainage for fluids and to relieve pressure that can buildup after childhood ear infections
ear tubes (tympanoplasty tubes)
the eversion of the edge of an eyelid
ectropion
the inversion of the edge of an eyelid
entropion
strabismus characterized by an inward deviation of one or both eyes
esotropia (cross-eyes)
strabismus characterized by the outward deviation of one eye relative to the other
exotropia (walleye)
a surgical procedure in which a new opening is created in the labyrinth to restore lost hearing
fenestration
particles of cellular debris that float in the vitreous fluid and cast shadows on the retina
floaters (vitreous floaters)
a radiographic study of the blood vessels in the retina of the eye following intravenous injection of a fluorescein dye as a contrast medium
fluorescein angiography
the application of a fluorescent dye to the surface of the eye via drops or a strip applicator
fluorescein straining
a group of diseases characterized by increased intraocular pressure that causes damage to the optic nerve and retinal nerve fibers
glaucoma
an electronic device that is worn to correct a hearing loss
hearing aid
blindness in one half of the visual field
hemianopia
a measure of sound frequency that determines how high or low a pitch is
hertz
a pus filled lesion on the eyelid resulting from an infection in a sebaceous gland
hordeolum (stye)
a vision defect in which light rays focus beyond the retina; also known as farsightedness
hyperopia (farsightedness)
an accumulation of earwax that forms a solid mass by adhering to the walls of the external auditory canal
impacted cerumen
a contagious inflammation that causes painful blisters on the eardrum
infectious myringitis
a surgically implanted replacement for a natural lens that has been removed
intraocular lens
the surgical removal of a portion of the tissue of the iris
iridectomy
inflammation of the uvea primarily affecting structures in the front of the eye
iritis
inflammation of the cornea
keratitis