macular degeneration

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A condition in which the cells of the macula lutea degenerate, causing blurred vision and ultimately blindness.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A disease of the retina of the eye resulting in loss of central vision.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun eye disease caused by degeneration of the cells of the macula lutea and results in blurred vision; can cause blindness