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Age-related macular degeneration (AMD) occurs when tissue in the macula — the part of your retina that's responsible for central vision — deteriorates. This causes a blind spot to form in your central vision.
Dry macular degeneration is more common. It is caused by the slow deterioration of the central retinal tissues. Wet macular degeneration, which occurs when abnormal blood vessels leak fluid or blood into the macula, is more likely to cause a relatively sudden change in vision. To check for dry macular degeneration, your doctor will examine the back of your eye for a mottled appearance caused by drusen — yellow deposits that form under the retina. In the early stages of dry macular degeneration drusen appear small (left). As the condition progresses to the advanced stage (right), large drusen develop and the light-sensitive cells that make up the macula break down.
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