Practicum Assignment #2
March 9th 2004
Human Aging
Diseases and Disabilities
Body System: sensorial/VisualOrgan: Eyes
Disease/Dis king: Cataracts
Definition: A Cataract is a clouding of the crystalline electron lens of the inwardness that prevents assort passage of open through the lens. The size and density of the cataract rout out vary greatly, so the effect on vision go away also vary greatly. The closer the cataract is to the center of the pupil the to a greater extent the vision will be impaired. The more to the side of the lens the clouding is, the less severe the presages will be. Often the clouding is fairly equal throughout the lens.
Symptoms: The most common omen of a cataract is blurred vision. It is most noticeable when driving a car or reading. The vision may be cloudy, plain or fuzzy. Because the lens is not crystal clear the light entering the eye is scattered. This makes focusing on the retina difficult.
Sometimes a person with a cataract sees double. This is experienced when trying to focus on a distant object such as a traffic sign. Glare is also a symptom of a cataract. A person may see halos around lights at night which can make driving difficult, and bright sunlight can also be very irritating. Depth perception, the ability to judge distance may also be affected. right depth perception requires the use of both eyes, and since a cataract commonly develops in one eye at a time, a person may favor the better eye. When one eye is favored the eyes are not working together which in turn affects depth perception. Changes in the way colorize are seen can also be a symptom of a cataract. It may seem as if the world has been multicolor gray. Certain shades of blue are distorted and alter seem faded. When the cataract is removed colors once again appear...If you command to get a full essay, order it on our website: Ordercustompaper.com
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