From AARP!
Shellfish like oysters are among the best sources of the mineral zinc, which protects the eyes against the damaging effects of sunlight, McDonald notes. In high doses, zinc also appears to slow the progression of macular degeneration once you have early stages of the disease. But you don’t need more than the recommended dose — 8 milligrams a day for women and 11 milligrams a day for men. Oysters deliver more of the mineral than any other food, but you also can get plenty of zinc from lean red meat, poultry, beans, legumes and fortified cereals.