The probability of cataracts in the elderly is still relatively high, and cataracts have a large impact on all of us. There are various types of cataracts, and developmental cataracts can be completely prevented by paying more attention to the health and vision of the eyes on a regular basis. 1. Avoid bright light. Strong light, especially ultraviolet light from the sun, can damage the crystals of the eyes. It is recommended to wear sunglasses when the sun is strong. 2. Drink more water. Lack of water in the body is one of the causes of crystal clouding, so make yourself a habit of drinking more water. Also, prevent diarrhea, vomiting and heavy sweating to avoid dehydration. 3. Replenish protein. People’s cornea, crystal and retina need protein, and protein deficiency makes them prone to eye diseases such as keratoconus, cataract and night blindness. It is recommended that people usually eat more lean meat, fish, eggs, milk and soy products. At the same time, also often supplement cod liver oil, often eat chicken liver, lamb liver, pig liver, carrots, parsley, rape, spinach and so on. 4, supplement vitamin C. The content of vitamin C in the human eye is 30 times higher than in the blood, but as we age, the vitamin C content in the human eye decreases significantly, which can lead to crystal malnutrition. Over time, this can cause crystal degeneration. It is recommended that people often eat vegetables and fruits rich in vitamin C. 5, supplement B vitamins, B vitamin deficiency, eyes easy to dry, conjunctival congestion, eyelid inflammation, blurred vision, etc.. It is recommended that people eat more food rich in B vitamins, such as peanuts, beans, millet, animal offal, meat, etc. Lutein deficiency in the eye can lead to the occurrence of eye diseases. Supplementation of lutein can effectively curb the production of free radicals in the vitreous, accelerate the removal and excretion of free radicals, avoid the glycation and oxidation of proteins in the vitreous, protect the SH group of soluble proteins from damage, and reduce insoluble proteins to soluble proteins, which can stop the clouding of the lens and control the formation and progress of progressive cataract.