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Tuesday, June 16, 2009

The Types Of Macular Degeneration You Get

By Candace Hubbs

Among older individuals, macular degeneration is the top cause of blindness or vision loss. This degeneration refers to the tissues around the macula, which is the part of the retina that allows for sharp vision.

The dry version of macular degeneration is actually the early stage of the disease. Although its exact cause is not known, it is believed to be caused by age and the thinning of the macular lining.

Dry or non-neovascular macular degeneration is believed to be the early signs of macular degeneration in general. The dry version is caused by deposits and debris of the tissue surrounding the macula. These deposits, known as drusen, are seen as yellow spots in the retina. Drusen builds up and causes vision loss. Dry macular degeneration is the less severe version of the disease. There is no known treatment for the illness, but some vitamin studies have proven hopeful.

The other, more severe, version of macular degeneration is characterized by a process known as neovascularization. This term refers to the formation of new blood vessels. It is actually the body's attempt to repair the damage of dry macular degeneration. Instead, it only causes further damage ultimately leading to blindness. The damage is caused by leakage that permanently damages the cells of the retina. Only a small fraction of people with dry macular degeneration progress to the more severe wet version.

Neovascular macular degeneration comes in two types. The occult version is the less severe. In this version the new vessels are not as distinct. Also the leakage is less evident. In the classic category, the new blood vessels are very pronounce and form distinctive lines beneath the retina. The leakage is also more evident. This type of macular degeneration causes the most severe vision loss. - 17269

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