Chapter 30- Ophthalmology and Otolaryngology

Chapter 30- Ophthalmology and Otolaryngology Astigmatism - An unfocused refraction of ligt rays on the retina Cerumen - Yellowish or brownish waxy secretion produced by sweat glands in the external ear Decibel - Unit of intensity of sound Fluorescein angiography - Intravenous injection of fluorescent dye; photographing blood vessels of the eye as dye moves through the vessels Hyperopia - Farsightedness intraocular pressure - Pressure within the eyeball Myopia - Nearsightedness Myringotomy - An incision into the tympanic membrane to relieve pressure Ophthalmologist - Physician who specializes in treatment of disorders of the eyes Ophthalmoscope - Lighted instrument used to examine the inner surfaces of the eye Optician - Specialist two grinds lenses to correct errors of refraction according to prescriptions Optometrist - Specialist who can measure for errors of refraction and prescribe lenses but who cannot treat diseases of the eye or perform surgery Otolaryngologist - Physician who specializes in the treatment of diseases and disorders of the ears, nose, and throat Otoscope - An instrument used for visual examination of the ear canal and tympanic membrane Presbycusis - hearing loss due to aging prebyopia - impaired near vision in middle age or older caused by loss of elasticity in the lens Refraction - The bending of a wave as it passes at an angle from one medium to another retinal degeneration - Pathological changes in the cell structure of the retina that impair or destroy its function, resulting in blindness Tinnitus - An extraneous noise heard in one or both ears, described as whirring, ringing, whistling, roaring, etc,; may be continuous or intermittent Tonometry - Intravenous injection of fluorescent dye; photographing blood vessels of the eye as dye moves through the vessels hordeolum (stye) - an infected sebaceous gland of the eyelid Strabismus - A misalignment of eye movements usually caused by muscle incoordination Cataracts - Clouding of opacity of the lense conjunctivitis - pinkeye; inflammation of the conjunctiva CONTINUES...