With the aging of the population, the number of Americans with major eye diseases is increasing. Age-related macular degeneration (AMD), cataracts, glaucoma, and diabetic retinopathy are the most common eye diseases in Americans age 40 and over, according to a 2004 study sponsored by the National Eye Institute (NEI) (Eye Diseases Prevalence Research Group, 2004). The study projected the number of people who are blind or have low vision to increase substantially by the year 2020. Blindness or low…