Nowadays, children generally live in buildings, unlike bungalows where they can go out easily. Not seeing sunlight naturally makes them prone to myopia. So don’t just attribute the cause of your child’s myopia to the problem of reading books, but also consider other factors. The benefits of sunlight: 1. Sunlight can encourage 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, the sun can prompt the body to secrete more dopamine. Dopamine can effectively inhibit the growth of the eye, which can inhibit the occurrence and development of myopia. 3, sunlight can make children’s pupils contract, increase the focus of the eyes, see things more clearly, thus playing a role in preventing the occurrence and development of myopia. 4, because most of the sun is outdoors, when the sun is too strong, people generally do not use their eyes too much up close, instead, they look more into the distance and activities, so that the eyes are relaxed, which is precisely the best way to protect vision, so it is conducive to myopia prevention. The benefits of outdoor sports, activities and play: 1. Outdoor sports, activities and play reduce the opportunity for children to use their eyes at close range and increase the time spent looking at the distance, which is very beneficial to the prevention and control of the occurrence and development of myopia. 2, sports can strengthen the body and enhance the function of the five internal 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, sports can make the human body muscle development, which also strengthens the function of the eye muscle. The eye muscles, especially the ciliary muscles, are normally regulated and strong, and the eyes are less prone to myopia. 4, when people see things, only the image of the object focused on the retina of the back wall of the eye, can see clearly. When looking close, the eye muscles are adjusted to lengthen the eye axis in order to bring the focus to the retina and see clearly; when looking far away, the eye muscles are adjusted to shorten the eye axis in order to bring the focus to the retina and see clearly. When looking close, the eye axis lengthens as a homeopathic process; when looking far, the eye axis shortens as a counter-pathic process, requiring more force. Where does this strength come from? It comes from the usual sports. 5, the study found that myopia, especially high myopia children than the average normal child eye pressure is high. The high intraocular pressure will help the eye axis to become longer and develop myopia. Sports can level a person’s blood pressure and lower the eye pressure, thus reducing the chance of myopia occurring and developing. In addition, long-term bending, head lowering and weight bearing can cause eye congestion, increase intraocular pressure, and lengthen the eye axis, increasing the chances of myopia occurring and developing. It is important to note that it is important for children to spend more time outdoors and in the sun, so that the ultraviolet rays of the sun shine directly on them for more than 2 hours a day in order to get enough dopamine and vitamin D. Contemporary children are busy with school and homework is a real problem. But no matter what, parents should also try to take their children outside as much as possible for activities, sports and play. This is a very important measure in the prevention and treatment of myopia and should not be taken lightly by parents or children. It is important to note that you should not expose your child to the sun in the summer, nor should you sunbathe indoors through glass, as this will not achieve the purpose of UV exposure. The author found in decades of myopia prevention practice, who can do “hold a pen two horizontal fingers, arm elbow on the table; straighten the arm to read, write, look, look at the two points of the daily telescope and outdoor sports”, the chances of myopia is very small; otherwise, the chances of myopia occurrence and development is very large.