Macular degeneration is damage to the macula (a part of the retina in the eye) which results in central vision loss.

As the eye looks straight ahead, the macula is the point of the retina where light rays meet as they are focused by the cornea and the lens of the eye. Similar to the film in a camera, the retina receives images that come through this "camera-like" lens. If the macula is damaged, central part of the images are blocked, as if a blurred area had been placed in the center of the...