Macular degeneration is the leading cause of sight loss in seniors. Macular degeneration causes distortion or loss of central vision. The reason for this is that the macula is the focal point of light in your eye, and thus is responsible for your ability to see the details of the world. The incidence of macular degeneration increases with age.
Currently 1.75 million people in the United States have macular degeneration and that number is expected to grow to 2.95 million by 2020 due to the overall aging of our population.