Vision loss from
age-related macular degeneration (AMD) is caused by
damage to the light-detecting nerve cells in the
macula. The cause of this damage to the nerve cells is
dry AMD, cells in the macula break down, resulting in vision problems. No
one knows why some people get AMD but others do not. In the early stages of dry
AMD, a type of debris called
drusen, which comes from cells, builds up in the area
under and around the macula. When viewed with
ophthalmoscopy, which is a way of seeing inside the
eye, drusen appear as yellowish white spots under the
retina. Although some small drusen can usually be
found in the macula as a normal result of aging, the development of numerous
large drusen is associated with AMD.2
Wet AMD is caused by
the growth of abnormal blood vessels under the macula. Experts are studying why this happens. The blood vessels break easily and leak blood and
fluid under the macula. The excess blood and fluid, along with abnormal scar
tissue that forms under the macula, distort and damage the
This answer should not be considered medical advice...This answer should not be considered medical advice and should not take the place of a doctor’s visit. Please see the bottom of the page for more information or visit our Terms and Conditions.
Thanks for your feedback.
3 of 4 found this helpful
WebMD Medical Reference from Healthwise This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
© 1995-2011 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.