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Chapter 21 Vocab
Term | Definition |
---|---|
Astigmatism | A refraction error that causes distorted and blurred vision for both near and far objects due to oval shaped cornea. |
Audiometer | An instrument used to measure hearing acuity quantitatively for various frequencies of sound waves. |
Canthus | The junction of the eyelids at either corner of the eye. |
Cerumen | Earwax: protects and lubricates the ear. |
Hyperopia | Farsightedness. |
Impacted | Wedged tightly together to be immovable. |
Instillation | The dropping of liquid into a body cavity. |
Irrigation | The washing of a body canal with flowing solution. |
Myopia | Nearsightedness. |
Otoscope | An instrument used to examine the external ear canal and tympanic membrane. |
Presbyopia | A decrease in elasticity of the lens that occurs with aging, resulting in decreased ability to focus on close objects. |
Refraction | The deflection or bending 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. |