You should get enough vitamin A every day. The best source of vitamin A is the liver of various animals and fish. Sheep liver and pig liver. Milk and eggs. Plant foods include carrots, amaranth, spinach, leeks, green peppers and sweet potatoes with red hearts, and fruits include oranges, apricots and persimmons. Vitamin A can prevent and treat dry eye.

Foods containing vitamin C lack vitamin C and are prone to cataracts. Foods rich in vitamin C include all kinds of fresh vegetables and fruits, among which green pepper, cucumber, cauliflower, Chinese cabbage, fresh dates, raw pears and oranges have the highest content.

Foods containing calcium, such as beans, green leafy vegetables, shrimp skin, etc., are rich in calcium.

So do carrots.

And be careful not to use your eyes too much!