'Age-related macular degeneration (ARMD) is the primary cause of older age onset partial or sometimes total blindness. Although most common in adults over 50, macular degeneration can occur at any age, though rarely among those under 50.
Macular degeneration mostly affects central vision, forcing people to rely more on less distinct peripheral vision to recognize objects and faces. The macula occupies a small portion of the retina in the back of the eye.'
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