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During the epidemic, the use of electronic products by children and adolescents increased, outdoor activities decreased, and the risk of myopia occurred and progressed. To guide the prevention of myopia in children and adolescents during the outbreak, the National Commission of Health and Health issued the “Guidelines for the prevention of myopia during coronary pneumonia in children and adolescents (updated version)”, which clearly limit the online learning time. More than 20 minutes; High school students no more than 4 hours a day, no more than 30 minutes each time.
The guidelines are clear and reduce screen time away from online learning. In addition to the online education time organized by the education department, screen time for other purposes does not exceed 1 hour per day.
The guidelines recommend that large-screen electronic products be selected as much as possible, giving priority to projectors, televisions, desktops, laptops, tablets, and mobile phones; electronic products with high screen resolutions and appropriate definitions should be selected; When using electronic products, adjust the brightness so that your eyes feel comfortable, not too bright nor too dark. At the same time, electronic products should be placed away from windows and direct lights, with the side of the screen facing the window to prevent the screen from irritating the eyes; When using the projector, the viewing distance must be more than 3 meters; When using the TV, the viewing distance should be opposite the screen. The angle distance is more than 4 times; When using a computer, the viewing distance must be greater than 50 cm (approximately one arm long); When placing electronic products (such as a computer), the top of the screen should be level with eye level.
During online learning, increasing active rest time can not only relax the ciliary muscles and relieve eye fatigue, but also reduce brain fatigue, improve learning efficiency, and relieve tension. For example, the continuous video learning time is 20 to 30 minutes, at least 10 minutes of active rest; During the video learning process, consciously close your eyes and open your eyes slightly, roll your eyes up and down, relax your eyes; expand your waist and arms while studying online, You can walk inside, do gymnastics, squat exercises, squats, etc .; do eye exercises after washing your hands; stand in front of a window, balcony or door, and look into the distance (more than 6 meters); You can pass the balcony, bathe in the sun by the window or on your own patio and touch the natural light.
The guide also established clear reading and writing posture requirements, lighting and lighting requirements, and family desk and chair settings. Parents are reminded that during the epidemic, families must create a good environment to help children maintain learning laws and rhythms of life, and ensure that children get regular rest and sleep, get enough sleep, and get a good night’s sleep. adequate physical activity. For example, to ensure adequate sleep time every day, elementary students must reach 10 hours, high school students 9 hours, high school students 8 hours; When studying at home, they should avoid forming bad habits like sleeping late and getting up late to reduce interference with the biological clock.
During the epidemic, routine vision screening, optometry, and optics are recommended for children and adolescents to discontinue treatment. If optometry is really necessary because of reduced vision, the apprenticeship should go to an ophthalmology department or ophthalmology center of a professional hospital. (Reporter Liu Huan)
