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Visual & Auditory

CMA110

TermDefinition
Visual Acuity Acuteness or sharpness of vision
Refraction Bending of the parallel light rays coming into the eye so they can be focused on the retina
Errors of Refraction Most common caused of defects in visual acuity ( caused by abnormal eyeball shape: long and squished) Most vision problems are due to this.
Myopia AKA nearsighted. Eyeball elongated from front to back
Hyperopia AKA farsighted. Eyeball to short from front to back
Presbyopia Decrease in elasticity of lens. Usually begins after age 40.
Ophthalmologist Physician that performs eye surgery
Optometrist Physician that can measure visual acuity and prescribing corrective lenses
Optician Professional who interprets and fills prescription for eyeglasses and contact lenses
Distance Visual Acuity (DVA) Used to diagnose myopia.
Snellen Chart Used to measure "distance" visual acuity.
What's the Recommended Age for an Eye Exam? 3 years old
How Often Should a Person Get an Eye Exam? Every 2-3 years.
What is Used to Measure Near Visual Acuity? Jaeger Card
Ishihara Test Used for color vision test.
Conductive Hearing Loss Physical interference with normal conduction (transmission) of sound wave through the external and middle ear.
Sensorineural Hearing Loss Damage to the inner ear or auditory nerve.
Weber Test Set a tuning fork in vibration placed on center of patient's head.
Rinne Test Set tuning fork on vibration place against bone of mastoid process.
Audiometry/Audiometer Instrument that quantitatively measures the various frequency of sound waves.
Tympanometry Process of measuring mobility of the ear drum (helps determine lost of hearing loss)
20/50 A person can see at 20 ft when a normal vision person can see at 50ft
20/10 A person can see at 20 ft when a normal vision person can see at 10 ft
Legally Blind 20/200
Mixed Hearing Loss Combination of both conductive and sensorineural.
Created by: itsdelis