Xinhua News Agency, Beijing, June 5 (Reporter Wang Bingyang) The National Health Commission held a regular press conference at Beijing Tongren Hospital on June 5 to introduce the progress and effectiveness of my country's eye health work. The head of the National Defense Blind Technical Guidance Group Wang Ningli said at the meeting that the overall incidence of myopia in children and adolescents in my country is 53.6%, and more than 90% of college students are myopic.

  Under current medical technology, myopia cannot be cured. The concept of "emphasis on prevention" should be changed, starting with prevention and reducing myopia. But now electronic offices, online classrooms, etc. have increased the time to use electronic products. In addition to limiting the time to use electronic products to protect eyesight, is there any other way?

  "There will be a problem when reading electronic products. When you concentrate, the transient frequency of the eyes will be reduced. That is, the frequency of closing your eyes will decrease significantly, which will expose the cornea to the outside air. So you must take the initiative to read Blinks during the process of working and working." Wang Ningli suggested that reading the paper for 40 minutes, electronic products should be controlled at 20 minutes, and then let your eyes relax.

  To protect your eyes, telephoto is the most important. Wang Ningli said that he must force himself to walk to the balcony and walk to the window to see objects 5 meters away for 10 minutes. This is the best protection.

  Previously, Wei Wenbin, deputy director of Beijing Tongren Hospital and director of the Department of Ophthalmology, also emphasized that the use of electronic products should still emphasize the "20-20-20" formula. After 20 minutes of watching the screen, you must look up and look at 20 feet, which is 6 meters away. 20 More than seconds. The selection of video tools should also adhere to the principle of "Ningda is not small". The order of selection is projection, TV, computer, tablet, and mobile phone.

  Wei Wenbin said that improper size of the screen, refresh rate of the display and the distance used can easily cause visual fatigue, which can cause eye diseases such as myopia or dry eye. The resolution of the monitor generally does not cause visual fatigue.

  Wei Wenbin suggested that the parameter setting of the screen: the height should be kept horizontal or slightly lower in the center of the eyeball and the video. The distance is 4-6 times the diagonal length of the electronic screen. The refresh rate of the cathode ray tube CRT display is generally 75-85 Hz. If it is an LCD screen, there is no need to adjust the refresh rate. In addition, the ambient light should be suitable. When using electronic products at night, you need to turn on the light and dim the screen brightness to 30%. You can set a green background screensaver wallpaper to relieve eye fatigue.