Go fish for healthy vision. Some research shows that people who have a higher dietary intake of foods containing omega-3 fatty acids from fish have a reduced risk of advanced age-related macular degeneration, a condition characterized by the deterioration of the central retina (a.k.a. macula) that is the leading cause of blindness in people over 50. Each week, aim to eat two servings of fish. Top a vegetable salad with poached salmon for lunch; serve a savory tilapia recipe for dinner.