Myopia has become a common problem in modern society, especially in urban children. The causes of these myopia have been the subject of medical discussion. In response to the complex living environment of urban children, experts point out that eating too much sugar is also a cause of myopia. There are many causes of myopia, such as children often watch TV, read picture books, read and write, do not go downstairs all day, do not go out of the house, have a small field of vision, long-term close vision, resulting in eye ciliary muscle tension, lens deformation, causing myopia. There is another causative factor, which many people do not know, is that eating too much sugar will make myopia higher and the condition worse. Because eating too much sugar will lead to higher blood sugar, correspondingly lowering the osmotic pressure of body fluids, so that the atrial water in the eye penetrates into the lens, causing lens distortion and increasing refractive error, thus causing or aggravating myopia. On the other hand, sugar is acidic, and excessive consumption will cause excessive depletion of alkaline substances in the body. Calcium, chromium and other elements are alkaline substances, and if they are greatly reduced due to excessive consumption, they will also promote or aggravate myopia. On the other hand, eating too much sugar, vitamin body sugar metabolism needs vitamin deficiency, so that the optic nerve malnutrition and shadow is taken out of the body in large quantities, becoming the cause of myopia. I do not know through the above-mentioned introduction, on the in-depth understanding of the causes of myopia is helpful. Sweet food is also an important cause of myopia Myopia is now a common eye disease, especially among students with heavy academic workloads and white-collar workers who work late at night for a long time, and most of these myopia causes are related to improper reading and writing posture. Recent studies have shown that eating sweets for long periods of time may also be a cause of myopia. Sweet food in the process of digestion, absorption and metabolism will produce a large amount of acid, and the body’s calcium neutralization, can cause a decrease in blood calcium, while the lack of calcium will make the eye wall elasticity is reduced, the eye axis elongation. Excess sweets also tend to cause changes in the osmotic pressure of the atrial fluid in the eye, causing the lens to bulge out and the image to blur, which becomes the cause of myopia. Excessive consumption of sugar can cause excessive consumption of vitamin B1 in the body, and once vitamin B1 is deficient, it can lead to neuropathy and become one of the causes of myopia. Therefore, especially for teenagers, do not be partial in diet, especially do not prefer high sugar food, should taste all the five flavors of sweet, sour, bitter, spicy and salty; if you eat less vegetables and fruits, then you can properly supplement some vitamin B1 tablets. This is just one of the causes of myopia. Myopia has been one of the biggest killers of vision in modern society, and this is one of the reasons why the prevention of myopia needs to be strongly advocated. We hope to raise awareness in this regard, understand the causes of myopia, and work together to prevent it.