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Key Terms
Chapter 6
| Term | Definition |
|---|---|
| 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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