Disease analysis: Hello, vitamin A is necessary to maintain normal visual response. Foods rich in vitamin A include pig liver, chicken liver, sheep liver, milk, egg yolk, carrot, spinach, leek, shepherd's purse, lettuce leaves, day lily or dried apricots. Suggestion: Vitamin C is also good for eyes. The content of vitamin C in human eyes is several times higher than that in blood. With the increase of age, the content of vitamin C decreases obviously, and the lens is malnourished, which will cause lens degeneration over time.