MACULAR DEGENERATION

Macular degeneration is a disease of the macula (the small area in the retina at the back of the eye). It allows you to see fine details clearly and do things like read and drive. When the macula doesn't work properly, your central vision can be blurry and you may have areas that are dark or distorted. 

Macular degeneration is the most common cause of severe vision loss in people older than 50. Although it reduces vision in the central part of the retina, it usual doesn't affect the eye's peripheral vision.  There are two types of macular degeneration, dry and wet.