Cars

Brenda Deckman Practicum Assignment #2 March 9th 2004 Human Aging Diseases and Disabilities physical structure System: sensorial/VisualOrgan: Eyes Disease/Dis king: Cataracts description: 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 switch greatly, so the proceeding on vision go away also vary greatly. The closer the cataract is to the center of the pupil the to a greater purpose 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 throu ghout the lens. Symptoms: The most common figure of a cataract is blurred vision. It is most noticeable when driving a car or reading. The vision may be cloudy, battlefield or fuzzy. Because the lens is not crystal clear the set down entering the center field 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 b reform fair weathe r can also be very irritating. Depth perce! ption, the might to judge distance may also be affected. right depth perception requires the use of both eyes, and since a cataract usually 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 gloss are seen can also be a symptom of a cataract. It may seem as if the world has been varicolored gray. Certain shades of blue are distorted and substitute seem faded. When the cataract is removed colors once again appear...If you instruction to get a full essay, order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay