Outdoor sports are good for physical and mental health and relaxation, but there is another benefit of outdoor sports that is rarely known – it can prevent myopia. Nowadays, children generally live in buildings, so they spend less time outdoors and do not see the sun. So what are the benefits of increasing outdoor activity time? A, increase outdoor activities more sun benefits: 1, the sun can prompt the body to secrete more vitamin D. Vitamin D can increase the absorption of calcium in the body. Calcium is an indispensable element for the human body. For the eyes alone, the lack of calcium makes it easy for the elasticity and surface tension of the eyeball wall to weaken, making it easy for the eye axis to elongate and develop myopia when using the eyes at close range or in a low head condition. 2, sunlight can also promote the body to secrete more dopamine. A study found that dopamine can effectively inhibit the growth of the eye, which can inhibit the occurrence and development of myopia. 3, because most sunbathing is outdoors, the sun is a full-spectrum light source. At the same time, when the sun is too strong, people generally do not use their eyes too much up close, but more to look into the distance and activities, so that the eyes are relaxed, which is conducive to myopia prevention. Outdoor sports, activities and play reduce the chances of children using their eyes at close range and increase the time spent looking into the distance, so that the eye muscles can be fully relaxed, which is very beneficial to the prevention and control of myopia. 2, sports can strengthen the body and enhance the function of the five organs. Chinese medicine believes that the eye is divided into five rounds, corresponding to the five organs. The five organs are healthy, the eyes are clear, not easy to myopia. 3, the process of sports eye muscle is also in motion, increasing the flexibility of the eyes to see far and tight, but also hinder the occurrence of myopia. Some scholars have found that for every 1 hour of outdoor activity per day, the risk of myopia is reduced by 2%, with differences between rural and urban areas and between seasons. So take action and get your kids outdoors more often!