We should pay attention to eat more food rich in vitamin A, carotene and vitamin B2; at the same time, the selection of high phospholipid-containing foods in order to strengthen the brain, such as egg yolks, fish, shrimp, walnuts, peanuts, etc.; but also consciously choose more to protect the eyes of the food, such as eggs, animal liver, kidneys, carrots, spinach, millet, cabbage, tomatoes, cauliflower, cabbage, Chinese wolfberries. Diet should be far from three white (sugar, salt, lard), near three black (black sesame, mushrooms, black rice). From the nutritional value, four legs (pig, cow, sheep) is better than two legs (chicken, duck), two legs is better than one leg (mushroom), one leg is better than no leg (fish). Eat kelp and river fish regularly. Fish oil reduces the rate of cell death.