Med-Surg Nursing - 21
Terms
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- acoustic neuroma
- a benign tumor that occurs where the acoustic nerve (CN VIII) enters the internal auditory canal or the temporal bone from the brain
- amblyopia
- reduced vision in an eye that is not corrected by refraction and does not have an obvious pathologic or structural cause
- aphakia
- the absence of the crystalline lens
- blepharitis
- a chronic bilateral inflammation of the lid margins
- cataract
- an opacity within the crystalline lens
- chalazion
- an inflammation of a sebaceous gland in the eyelids
- cholesteatoma
- an accumulation of keratinizing squamous epithelium in the middle ear
- conjunctivitis
- an infection or inflammation of the conjunctiva
- crystalline lens
- a biconvex, avascular, transparent structure enclosed in a capsule located behind the iris; ciliary body controls shape to bend light rays so that they fall onto the retina
- cycloplegic
- agent that causes ciliary body muscle paralysis and paralysis of accommodation
- enucleation
- removal of the eye
- external otitis
- inflammation or infection of the epithelium of the auricle and ear canal
- glaucoma
- a group of disorders characterized by (1) increased intraocular pressure and the consequences of elevated pressure, (2) optic nerve atrophy, and (3) peripheral visual field loss
- hordeolum
- an infection of the sebaceous glands in the lid margin
- intraocular lens (IOL)
- a small plastic lens that can be implanted either in the anterior or posterior chamber as a replacement for a lens removed for cataracts; provides very little optical distortion, especially compared with aphakic spectacles or even aphakic contact lenses
- Jaeger chart
- a chart used to test near visual acuity
- keratitis
- an inflammation or infection of the cornea that can be caused by a variety of microorganisms or by other factors
- keratoconus
- a non-inflammatory, usually bilateral disease of the cornea that is familial but has no exclusive inheritance pattern
- labyrinthitis
- an inflammation of the inner ear affecting the cochlear or vestibular portion of the labyrinth or both
- laser photocoagulation
- the use of an intense, precisely focused light beam, such as the argon laser, to create an inflammatory reaction
- Meniere's disease
- a disease characterized by symptoms caused by inner ear disease including episodic vertigo, tinnitus, fluctuating sensorineural hearing loss, and aural fullness
- miotic
- agent that causes pupillary constriction
- mydriatic
- agent that causes pupillary dilation
- otosclerosis
- the fixation of the footplate of the stapes in the oval window that results in decreased hearing acuity
- presbycusis
- hearing loss associated with aging
- refractive error
- defect of the refracting media of the eye that prevents light rays from converging into a single focus on the retina
- retinal detachment
- a separation of the sensory retina and the underlying pigment epithelium, with fluid accumulation between the two layers
- Snellen chart
- a chart used to test far visual acuity
- strabismus
- a condition in which the patient cannot consistently focus two eyes simultaneously on the same object