At present, myopia in children and adolescents presents a serious situation of aging, progress and generalization. Myopia prevention and control has been upgraded to the national level, so how to effectively prevent and control myopia effectively? We need to lift the veil to find the underlying causes. Thinking through the comparison triggered In order to better understand the current myopia of children and young people in a serious situation, we may wish to do a comparison with the myopia situation twenty years ago: before is to look at a class within a few myopic, and now it is to look at a class within a few non-myopic; before more than in the period of high school myopia, myopia rate of elementary school students is now as high as 46.21%; before the number of myopia from the discovery of adulthood is almost no significant growth, and now 80% of the myopia is not the same as that in the past. In the past, most myopia patients were the best learners, but now myopia patients are not only related to learning; Lighting used kerosene lamps and yellow bulbs in the past, but now we use incandescent lamps with much better brightness conditions; Finding Answers through Comparison The above comparison only illustrates the changes in myopic conditions before and after two decades, then the deeper reasons for the difference between the myopic conditions of the present and the previous myopic conditions are very different. The above comparison only illustrates the changes in myopia before and after twenty years. We have to look for the answer from the comparison with twenty years ago: in the past, children used to play at home after school, but now most of them play at home; in the past, children used to play in groups, but now they play alone; in the past, children used to play with long-distance eye recreation, such as playing four-corners, throwing sandbags, bouncing glass balls, playing shuttlecock, and jumping ribbons, but now they play with long-distance eye recreation, such as playing with cell phones, computers, and video games; in the past, sports recreation was more popular; in the past, sports recreation was more popular; and now children play with cell phones, computers, and video games. The most important thing is that the attraction of entertainment at home is far greater than that of outdoor entertainment, so they are not willing to go out to play. In addition, many parents do not have eye care awareness and eye care methods, children will certainly be myopic earlier, faster development. Of course, there are many other reasons: for example, there was no kindergarten in those days, and children started to study only at the age of 6 or 7; in those days, there was not as much homework as nowadays, and there were not as many tutorials and special classes as nowadays; in those days, the food and the environment were much greener than nowadays; however, we are not capable of changing them nowadays, and we can only change the children’s habits of eye care and the way of recreation. Myopia prevention and control starts from changing children’s entertainment Through the many comparisons above, I think the most important thing is to start from changing children’s entertainment and regaining the healthy entertainment in the past. We parents only blame our children for playing cell phones and watching TV all day long, but we have never looked for and thought of healthy ways for our children to use their eyes. With a heavy workload and long hours of close eye contact, coupled with close eye contact during recreation, myopia will definitely develop earlier and faster. As for what is the healthiest form of recreation, I will provide guidelines in my WeChat public number, so that we can explore the eye-healthy forms of recreation according to these principles, and then publicize them to let every parent know about them.