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Glossary of Med-Surg Nursing - 20

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anisocoria
pupils are unequal in size (constricted)
aqueous humor
a clear watery fluid that fills the anterior and posterior chambers of the anterior cavity of the eye
astigmatism
an unevenness in the corneal or lenticular curvature, causing horizontal and vertical rays to be focused at two different points on the retina, which results in visual distortion
conjunctiva
a transparent mucous membrane that covers the inner surfaces of the eyelids
hyperopia
farsightedness; the focus of light rays behind the retina requiring the use of accommodation to focus for near and far objects
myopia
nearsightedness
nystagmus
an abnormal involuntary repetitive movement of the eyes
presbycusis
hearing loss due to aging
presbyopia
farsightedness resulting from a decrease in the accommodative ability of the eye as a result of aging
refraction
the ability of the eye to bend light rays so that they fall on the retina
retina
the innermost layer of the eye that extends and forms the optic nerve
sclera
an opaque structure composed of collagen fibers meshed together that encircles the globe of the eye; commonly referred to as the "white" of the eye
tinnitus
ringing in the ears

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