Medical Terminology: Chapters 13 & 14

Acoustic
Pertaining to the sense of hearing
Audiogram
A record of hearing by audiometry
Audiologist
One who specializes in disorders of hearing
Audiology
The study of hearing disorders
Audiometer
An instrument used to measure hearing
Audiometry
Measurement of the hearing sense
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Audiophone
An instrument that conveys sound to the auditory nerve through teeth or bone
Auditory
Pertaining to the sense of hearing
Aural
Pertaining to the ear
Auricle
The external portion of the ear, known as the flap of the ear; the pinna
Biaural
Pertaining to both ears
Cerumen
Earwax, the yellowish substance secreted by the glands in the canal of the external ear
Cholesteatoma
A tumor-like mass filled with epitheial cells and cholesterol
Cochlea
A portion of the inner ear shaped like a snail shell; contains the organ of hearing referred to as the organ of Corti
Deafness
Complete or partial loss of the ability to hear
Ear
Organ of hearing and equilibrium
Electrochochleography
A recording of the electrical activity produced when the chochlea is stimulated
Endaural
Pertaining to within the ear
Endolymph
The clear fluid contained within the labyrinth of the ear
Equilibrium
A state of balance. In the inner ear, the semicircular canals are the site of the organs of balance
Eustachian Tube
A narrow tube between the middle ear and the throat that serves to equalize pressure on both sides of the eardrum
Fenestration
Surgical operation in which a new opening is made in the labyrinth of the inner ear for restoration of hearing
Incus
The anvil, the middle of the three ossicles
Labyrinth
The inner ear; made up of the vestible, cochlea, and semicircular canals
Labyrinthectomy
Surgical excision of the labyrinth
Malleus
The hammer, the largest of the three ossicles
Meniere’s Disease
A disease of the inner ear
Otic
Pertaining to the ear
Oval Window
Membrane in the middle ear into which fits the footplate of the staples
Perilymph
Serum fluid of the inner ear
Persbycusis
Impairment of hearing in old age
Rinne Test
A hearing test made with a tuning fork to compare bone conduction hearing with air conduction
Tinnitus
A ringing or jingling sound in the ear
Tympanci
Pertaining to the ear drum
Utricle
A small, sac-like structure of the labyrinth of the inner ear
Vertigo
A feeling of dizziness, light headedness, caused by a disturbance of the quilibrium organs in the labyrinth
Accomodation
The process whereby the eyes make adjustments for seeing objects at various distances
Amblyopia
Dullness of vision
Anisocoria
A condition in which the pupils are unequal
Aphakia
A condition in which the crystalline lens is absent
Astigmatism
A defect in the refraction powers of the eye in which a ray of light is not focused on the retina but is spread over an area
Bifocal
Pertaining to having two foci, as in bifocal glasses
Blepharitis
Inflammation of the edges of the eyelids
Blepharoptosis
A drooping of the upper eyelids
Cataract
An opacity of the crystalline lens or its capsule; most often occurs in aduclts past middle age
Chanlazion
A small, hard, painless cyst of a meibomian gland (one of the sebaceous follicles of the eyelids)
Chorioditis
Inflammation of the vascular coat of the eye
Conjunctivitis
Inflammation of the conjunctiva
Corneal
Pertaining to the cornea
Cycloplegia
Paralysis of the ciliary muscle
Darcyoma
A tumor-like swelling caused by obstruction of the tear ducts
Diplopia
Double vision
Electroretinogram
A record of the electrical response of the retina to light stimulation
Emmetropia
Normal or perfect vision
Entropion
The turning inward of the margin of the lower eyelid
Enucleation
A process of removing an entire part or mass without rupture, as the eyeball from its orbit
Esotropia
A condition in which the eye or eyes turn inward; crossed eyes
Exotropia
The turning outward of one or both eyes
Glaucoma
A disease characterized by increased introcular, which results in atrophy of the optic nerve and blindness
Gonioscope
An instrument used to examine the angle of the anterior chamber of the eye
Hemianopia
The inablity (blindness) to see half the field of vision
Hyperopia
A defect in vision in which parallel rays come to a focus beyond the retina; farsightedness
Intraocular
Pertaining to within the eye
Irdiectomy
Surgical excision of a portion of the iris
Iridocyclitis
Inflammation of the iris and ciliary body
Keratitis
Inflammation of the cornea
Kertoconjunctivitis
Inflammation of the cornea and the conjunctiva
Keratoplasty
Surgical repair of the cornea
Lacrimal
Pertaining to tears
Laser
An acronym for Light Amplification by Stimulated Emission of Radiation
Macular Degeneration
Degeneration of the macular area of the retina, an area important in the visualization of fine details
Mircolens
A small, thin corneal contact lens
Miotic
Pertaining to an agent that causes the pupil to contract
Mydriatic
Pertaining to an agent that causes the pupil to dilate
Myopia
A defect in vision in which parallel rays come to a focus in front of the retina; nearsightedness
Nyctalopia
A condition in which the individual has difficulty seeing at night; night blindness
Nystagmus
An involuntary, constant, rhythmic movement of the eyeball
Ocular
Pertaining to the eye
Optic
Pertaining to the eye
Phacoemulisification
The process of using ultrasound to disintegrate a cataract
Phacolysis
Surgical destruction and removal of the crystalline lens in the treatment of cataract
Phacosclerosis
A condition of hardening of the crystalline lens
Photocoagulation
The process of altering proteins in tissue by the use of light energy
Photophbia
Unusual intolerance of light
Presbyopia
A defect in vision in which parallel rays come to a focus beyond the retina; occurs normally with aging; farsightness
Pupillary
Pertaining to the pupil
Radial Keratotomy
A surgical procedure that may be performed to correct nearsightedness (myopia)
Retinal
Pertaining to the retina
Retinitis
Inflammation of the retina
Retinoblastoma
A malignant tumor arising from the germ cell of the retina
Retinopathy
Any disease of the retina
Retrolental Fibroplasia
A disease of the retinal vessels present in premature infants
Scleritis
Inflammation of the sclera
Snellen Chart
A chart for testing visual acuity
Strabismus
A disorder of the eye which the optic axes cannot be directed to the same object; also called a squint
Sty (e)
Inflammation of one or more of the sebaceous glands of the eyelid; also called a hordeolum
Tonography
Recording of intraocular pressure used in detecting glaucoma
Trichiasis
A condition of ingrowing eyelids that rub against the cornea, causing a constant irritation to the eyeball
Uveal
Pertaining to the second or vascular coat of the eye
Uveitis
Inflammation of the uvea
Xenophthalmia
Inflamed eye condition caused by foreign material
Xerophytalmia
An eye condition in which there is dryness of the conjuntiva