Nowadays, myopia has become a worldwide problem. According to statistics, the total number of nearsighted people in China has exceeded 300 million, accounting for 1 3 of the world's nearsighted population, and the number of nearsighted teenagers ranks1th in the world. Moreover, with the rapid popularization of mobile phones, flat-panel TVs and LCD TVs, the myopia rate of students is also increasing year by year. The myopia rate of junior high school students has reached 60%-70%, and the myopia rate of senior high school students in many places even exceeds 90%. Therefore, children's vision protection has attracted the attention of every novice parent.

As we all know, mobile phones, tablets, televisions and other electronic products are a major culprit in daily life, but the contents behind these LCD screens attract children to explore and discover like addictive poison. So some parents thought: Will it be less harmful to replace the LCD screen with a projector? From the imaging principle of light, projector light enters the human eye through diffuse reflection, which is softer than direct light. However, in different environments and different viewing times, the impact on vision cannot be generalized, and parents need to listen to professional voices.

As early as 20 14, three medical staff from Zhejiang Eye Hospital took their children for four days and were reported in the news. In the experiment, the naked vision of three 6-year-old children was 5. 0 children were allowed to use iphone, ipad, 42-inch LCD TV and projector, respectively. By comparing diopter, tear film rupture time and blinking times per minute, the damage degree of different products to children's vision was judged. The results are as follows: From the experimental results, we can know that under the same conditions, the projection has the least damage to the eyes of the above four products. The short board of eye protection for mobile phones and tablets is the viewing distance. Coupled with strong concentration, playing mobile phone 10 minutes is equivalent to watching TV for 30 minutes! Therefore, if conditions permit, showing children the projection is the "best" choice. Compared with the traditional high-pressure mercury lamp projection, the popular LED intelligent projection on the market is safe and durable, and has rich network resources. In addition, we can absorb the necessary common sense and broaden our horizons while entertaining children and early education. One of the typical ones is the entry-level home projector such as Danbei Projection D 1, which is small and pleasing to the eye, and the interactive experience of the system is close to that of mobile phones and tablets, with gorgeous colors and clear picture quality, but the overall presentation is softer and eye-protecting.

Of course, the cause of myopia is not just a single product, but the eye environment. This environment, including the light, distance, posture, duration and so on, needs parents' company and more attention. Vision damage is irreversible forever. Don't let children hold mobile phones!