Age-related macular degeneration (AMD) is the leading cause of blindness in people over age 40. By age 60, about one fourth of adults show evidence of AMD. Fortunately, about 90 percent of them have the less serious variety of AMD.

It causes gradual vision loss as cells in the macula slowly break down. 

Everyone should be screened for AMD at age 40 and every five years thereafter. After 65, annual screenings are best.

Early AMD is not treated and doesn't affect vision, but it progresses. Detection of intermediate AMD is important. At that stage, you can benefit from a daily vitamin and mineral supplement.

A study reported by Johns Hopkins Medical Centers shows that participants reduced by 25 percent their risk of advanced "dry" AMD by taking a daily supplement. It contained 500 mg vitamin C, 400 IU vitamin E, 15 mg vitamin A, 80 mg zinc oxide, and 2 mg cupric oxide.

For specifics, always consult a board certified ophthalmologist.

You only have one set of eyes, so you need to protect them.