A large study sponsored by the National Institutes of Health found that certain vitamins, when taken together, can help prevent vision loss for those who have age-related macular degeneration. (It wasn't studied to show preventive powers for those who don't have the disease.)
The study found that those people who already had wet macular degeneration had a more than 25 percent reduction in their risk of vision loss if they took 500 milligrams of vitamin C, 400 international units of vitamin E, 15 milligrams of beta-carotene (yes, carrots are good for your eyes), 80 milligrams of zinc and 2 milligrams of copper every day in divided doses. P.S. We think that a lower dose of 30 milligrams of zinc is safer for longer periods of time.