What is the definition or description of: central vision deterioration?

Macular degeneration: Central vision deterioration or macular degeneration is the most common cause of blindness in the United States. It is usually associated with second hand cigarette smoke There are also genetic diseases such as Leber's Dystrophy and Myopic Macular degeneration or deterioration that can lead to central vision loss. It's imperative that you see an ophthalmologist, preferably a retina specialist.