Currently, some experts call for children to “eat” myopia! But myopia can also be “eaten” out! More and more studies show that: poor dietary structure and eating habits is one of the important causes of myopia. 1, eat sweets too much, increase the incidence of myopia. Teenagers like to eat sweets, sweets in the sugar content is often very high. Eat too much sugar, on the one hand, will lead to overnutrition obesity, on the other hand, will also cause vision loss. Because sugar metabolism requires the participation of vitamin B1, the more sugar, the more vitamin B1 consumption, and vitamin B1 is closely related to the development and function of the optic nerve. In addition, sugar metabolism can be converted into acid, acid and calcium combination, resulting in a decrease in calcium content, and calcium is also an essential nutrient for eye development. Zhongshan University Affiliated Third Hospital Ophthalmology Ling Shiqi 2, eat too fine or partiality, picky eating, triggering vision loss. “Eating too fine” is wrong in a sense. The more finely processed food, the more serious the loss of nutrients (especially trace elements). The bad habit of partiality and picky eating will lead to an imbalance in nutritional intake, which is mainly manifested in insufficient intake of inorganic salts and vitamins. Scientists have found that micronutrients such as chromium, calcium and vitamin B1 are commonly deficient in adolescents with myopia. 2.1 Inorganic salts (1) Chromium can maintain the balance of osmotic pressure in the lens of the eye. If chromium intake is insufficient, the osmotic pressure of the lens of the eye is difficult to balance, the lens will bulge out and become convex, resulting in an increase in refractive error and myopia. Adolescents are in the peak period of growth and development, and their demand for chromium is much higher than that of adults. Processed rice and white flour can lose 80% of chromium. Children eating only fine food for a long time will cause chromium deficiency in the body. Chromium is mainly found in coarse grains, brown sugar, beef, yeast and other foods. (2) Calcium can eliminate eye tension and prevent myopia. Calcium is the main regulator of neuromuscular excitability and has the effect of eliminating eye tension. Lack of calcium, neuromuscular excitability increases, the extraocular muscles will be in a high degree of tension, the pressure on the eyes increases, the eye axis is easy to lengthen; and young people’s eyesight is often in a state of visual fatigue, so it is very easy to form myopia. Shrimp skin is high in calcium, soybeans, milk, crispy fish, tofu and greens are also rich in calcium. (3) Zinc can improve the vision of myopic patients. Many metabolic enzymes in the eye are related to zinc. Zinc can maintain normal metabolism in the eye. Once zinc deficiency occurs, the eye will experience a decrease in aqueous humor, a decrease in the antioxidant capacity of eye tissues, and other phenomena, which can cause retinopathy and optic nerve atrophy in serious cases. Studies have shown that the hair zinc and serum zinc levels of young myopic patients are significantly lower than those with normal vision. Zinc is abundant in animal food, lean meat, animal offal, etc. are good sources of zinc, cabbage is also a good source of zinc. (4) Selenium is extremely important for the visual organs. Retinal cells, iris and lens are rich in selenium. Survey data confirms that all children with poor eyesight, selenium supplementation in the method of treatment after 1 year, the rate of improvement of vision up to 85%. It turns out that selenium is an important component of antioxidant enzymes, which can prevent free radicals from damaging the retina and protect vision. Sea cucumber is one of the foods with the highest selenium content. Seafood, animal offal, lean meat, cereals, dairy products, mushrooms, garlic, etc. are also high in selenium. (5) Copper is an important component of eye tissue. The iris ciliary body of human eye tissue contains a lot of copper, followed by the pigment epithelium of the retina. Copper deficiency, causing damage to the eye muscles, can also lead to retinal pigmentation and affect vision. It has been found that the serum copper of myopic patients is significantly lower, and the urinary copper is also significantly lower than that of normal people. Lean pork is one of the foods with the highest copper content, and animal liver, sesame, rape, soybeans and taro are also rich in copper. 2.2 Vitamins (1) Too little intake of lutein leads to vision degeneration. Lutein belongs to carotenoids and is abundant in fresh green leafy vegetables and citrus fruits. Lutein on the macula of the retina (macula is an important part of the human eye to see things, equivalent to the camera’s negative, the negative deterioration, can not be light-sensitive, can not be clear imaging. Macular degeneration, vision loss, until vision loss.) There is an important protective role. Statistics show that the incidence of myopia among urban students is much higher than that of rural students. The main reason is: rural children eat green vegetables directly from the ground every day, lutein intake is sufficient; in contrast, urban children intake of fresh green vegetables is much less, lutein intake is relatively insufficient. (2) Vitamin A is the computer family’s “eye guard”. Vitamin A can prevent corneal dryness and degeneration, eliminate eye fatigue, prevent vision loss. Animal liver, cod liver oil, eggs and other foods are rich in vitamin A. Plant foods such as carrots, sweet potatoes, apricots, persimmons, tomatoes and so on contain vitamin A (i.e., carotene), which can be converted into vitamin A in the body. (3) Vitamin B1 is one of the nutritional sources of the visual nerve. Acetylcholine has an important role in nerve conduction. Insufficient vitamin B1 will hinder the generation of acetylcholine, thus causing optic nerve conduction disorders, affecting the cornea of the eye, the normal function of the curvature of the light regulating muscle, leading to vision loss. In the roughly processed rice and noodles, grains, soy products, animal offal and lean meat, vitamin B1 content is relatively large. 3, eat hard food too little, lead to adolescent myopia increase. Eat hard food can prompt the facial muscles (especially the dominant eye muscles) of the movement, so as to effectively play the role of eye regulation. Japanese researchers after investigation: often eat soft food people like to eat hard food people’s eyesight more than a different degree of decline, so chewing is known as “alternative eye exercises”.