At present, there are a lot of anti-blue light glasses on the market, and mobile phones also have anti-blue light mode, is this effective in protecting eyesight and preventing myopia?
Beijing Tongren Hospital ophthalmologist and chief physician Wei Wenbin said at a conference today that there is an excessive interpretation of the hazards of blue light in society, and that prevention of blue light and visual fatigue is not directly related to the prevention and control of myopia.
He said that the quality-checked electronic products have been filtered with harmful short-wave blue light, "so in daily life, we use the regular manufacturers of electronic products, there is no need to install anti-blue light equipment.
In response to the new coronavirus pneumonia epidemic, many children are studying online at home through television, mobile phones, and computers. Wei Wenbin suggested that the selection of video tools to adhere to the principle of "rather large than small", the selection order for projection, television, computer, tablet, mobile phone.
With electronics, the "20-20-20 mantra" is still followed - after 20 minutes of looking at the screen, look up and see 20 feet (6 meters) away for more than 20 seconds.
In addition, Wei Wenbin pointed out that the size of the screen, the refresh rate of the display and the use of improper distance is also easy to cause visual fatigue, which causes myopia or dry eye disease and other eye diseases, while the display resolution of the high and low generally does not cause visual fatigue.
It is recommended that the screen parameters be set at a level or slightly lower position than the eye and the video center; the distance between the eye and the screen is 4-6 times the diagonal length of the electronic screen, and the refresh rate of the CRT display of negative grade ray tube is generally 75-85 Hz, in the case of LCD, there is no need to adjust the refresh rate.
At the same time, the ambient light should be suitable, when using electronic products at night, you need to turn on the lights and dim the brightness of the screen to 30%, you can set the green background of the screensaver wallpaper, to relieve visual fatigue.
