LEARN CH.11
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27 terms
Terms | Definitions |
|---|---|
 Strabismus | squint- condition in which the two eyes point in different directions |
| menieres syndrome | rare chronic disease in which the amount of fuild in the inner ear increases intermittently producing attacts of vertigo a fluctuating hearing loss and tinnitus |
| tympanometry | measurement of acoustic energy absorbed or reflected by the middle ear through the use of a probe placed in the ear canal |
| Pterygium | a benign growth on the cornea that can become large enough to distort vision |
| Nyctalopia | Night blindness |
| mydriatic drops | medicated drops placed into the eyes that produce temporary paralysis which forces pupils to remain dilated even in bright light |
| synechia | an adhesion that binds the iris to an adjacent structure such as the lens or cornea |
| photo refractive keratectomy | layers of corneal surface cells are shaved off |
| otosclerosis | ankylosis of the bones of the middle ear, resulting in a conductive hearing loss |
| blepharoptosis | drooping of the upper eyelid that is usually due to paralysis |
| hordeolum | sty; an acute infection of a sebaceous gland of the eyelid |
| prebyopia | Age related changes in sight |
| lacrimal duct | tear sac- enlargement of upper portion of the lacrimal |
| Entropin | is the turning in of the edges of the eyelid (usually the lower eyelid) so that the lashes rub against the eye surface... |
| macular degeneration | a gradually progressive condition in which the macula at the center of the retina is damaged, resulting in the loss of central vision, but not in total blindness |
| hyperopia | farsightedness; difficulty seeing close objects when light rays extend beyond the proper focus on the retina |
| cerumen | ear wax |
| Esotropia | One eye turns inward (cross-eyed). |
| presbycusis | hearing impairment in old age |
| ectropin | eversion turning outwards of the lower eyelid |
| myopia | nearsightedness; difficulty seeing distant objects when light rays are focused on a point in front of the retina |
| exotropia | turning outward of one or both eyes-( walleye) |
| semicircular canals | with INNER EAR contains the liquid endolymph and sensitive hair-like cells; the bending of these hair-like cells in response to the movements of the head set up impulses in nerve fibers to help maintain equilibrium |
| subconjunctivis hemorrhage | Bleeding between the conjunctiva and the sclera |
| organ of corti | Within cochlea- receptor site that receives these vibrations and relays them to the auditory nerve fibers. |
| scotoma | a blind spot; area of depressed vision surrounded by an area of normal vision |
| chalazion | Internal stye- a localized swelling inside the eyelid resulting from obstruction within a sebaceous gland |
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