Prevent myopia, don't worry about blue glasses, eye lights

- Nov 21, 2019-

"When you want to prevent myopia and wear anti-Blu-ray glasses, it is not necessary." "Before the age of 18, try to keep myopia below 600 degrees." On the occasion of "World Student Day", many experts reminded me. Preventing myopia and protecting your eyes, in addition to letting yourself be outdoors as much as possible in a natural light environment, you need a good light source. In addition, you don't have to be superstitious without a blue eye.


Fan Wen, deputy director of ophthalmology and associate professor of Jiangsu Provincial People's Hospital, said that the overall myopia rate of children and adolescents in China was 53.6% in 2018. Among them, the prevalence of 6-year-old children, primary school students, junior high school students and high school students was 14.5%, 36%, and 71.6 respectively. %, 81%. "If there is no effective policy intervention, by 2020, the number of people with myopia in China may reach 700 million, and the number of people with high myopia will reach 50 million."


Fan Wen said that there are genetic, genetic, and environmental factors in myopia. The myopia genes carried by Asians are more congenital than those in Europe and America. In addition, outdoor activities time can also affect people's vision.


In 2018, the United Nations Department of Health and Health and other relevant departments of the Ministry of Education researched and formulated the "Implementation Plan for the Prevention and Control of Myopia for Children and Adolescents", and proposed that by 2023, we will strive to achieve a reduction in the overall myopia rate of children and adolescents nationwide by 0.518 per year on the basis of 2018. Above the percentage point, the provinces with high incidence of myopia are reduced by more than 1 percentage point per year.


So how to protect the eyes and prevent myopia? Zhang Yuning, director of the Display Technology Research Center of Southeast University, suggested using the words "use good light".


First of all, to use a good light source, "a good light source requires that the spectral composition of the light source be as close as possible to natural light, the fluctuation of light with time as small as possible, and the use of a surface light source with less point light source."


Secondly, it is necessary to use light well, including scientific design, professional construction, regular inspection and real-time maintenance, and considering the attenuation characteristics of electronic devices, the light environment quality of such important places should be monitored regularly. "There are many schools, the illumination of the students' desktops and blackboards in the classroom is not enough, and the discharge and arrangement of the lamps are not designed. However, the parameters such as the size, orientation, height of the classroom, the position of the podium and the desks will affect the design position of the lamps. The lighting design at home is also very particular. For example, the contrast between the light of the desk and the background light of the home is not too strong, and the home background light can use more warm light sources."


Fan Wen suggested that outdoor activities of more than 2 hours per day can be guaranteed for 20 minutes at close range and can be looked up for 20 seconds in the distance to relieve eye fatigue. Before the child is 18 years old, try to control the myopia to below 600 degrees. Because more than 600 degrees is a high myopia, it may cause some serious complications.


For the "no blue light and no screen flash" eye-protection lamp currently on the market, Zhang Yuning believes that such a slogan is problematic. "No blue light is unnecessary. Blu-ray is an indispensable part of natural light. Blu-ray is not so horrible, it does not need to be eliminated, mainly because it is not excessively controlled. Parents give children anti-Blu-ray glasses, but make the colorful visual world It is not necessary to have distortion."