The initials AMD stand for a disorder called age-related macular degeneration. AMD is a disease that affects part of the back of the eye called the macula, the central part of the retina. This can cause the center part of your vision to become blurry or wavy. It could also cause a blind spot in the center of your vision. There are two types of AMD: "Wet" AMD This type of AMD causes the most serious vision loss. In this form of the disease, tiny unhealthy blood vessels grow under the retina. These blood vessels often break and leak, causing a loss in vision. "Dry" AMD This type of AMD is the most common form of the disease. It usually progresses more slowly than "wet" AMD.