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Key Terms

Chapter 6

TermDefinition
Astigmatism A refractive error that causes distorted and blurred vision for both near and far objects due to a cornea that is oval shaped
Audiometer An instrument used to measure hearing acuity quantitatively for the various frequencies of sound waves
Canthus The junction of the eyelids at either corner of the eye
Cerumen A yellowish waxy substance secreted by glands in the ear canal which functions to lubricate and protect the ear canal. Earwax
Hyperopia A refractive error in which the light rays are brought to a focus behind the retina resulting in difficulty viewing objects at a reading or working distance. Farsightedness
Impacted cerumen Cerumen that is wedged firmly together in the ear canal so as to be immovable
Instillation The dropping of a liquid into a body cavity
Irrigation The washing of a body canal with a flowing solution
Myopia A refractive error in which the light rays are brought to a focus in front of the retina resulting in difficulty viewing objects at a distance. Nearsightedness
Otoscope An instrument used to examine the external ear canal and tympanic membrane
Presbyopia A decrease in the elasticity of the lens that occur with aging, resulting in a decreased ability to focus on close objects
Refraction The deflection or ending of light rays by a lens
Tympanic membrane A thin, semitransparent membrane between the external ear canal and the middle ear that receives and transmits sound waves. Also known as the eardrum
Visual acuity Acuteness or sharpness of vision
Created by: Tangeladenise
 

 



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