Frequent online classes, how to protect your eyes?

first, we should choose and place electronic products scientifically. As far as possible, choose electronic products with large screens, give priority to televisions or projectors, followed by computers and tablets, and try to use or not use mobile phones for online classes. The selected electronic product screen should have high definition. Electronic products should be placed with the screen side facing the window. When using TV to surf the Internet, the distance from the screen should not be less than 4 times the diagonal of the screen, and when using a computer, the distance from the screen should not be less than 5 cm.

the second is to control the time of using electronic products. Online learning inevitably uses electronic products, but it should be based on the principle of using as little as possible. Try to shorten the time of continuous use of electronic screen in class. After every 3-4 minutes of continuous use, you should rest for 1 minutes. During this period, your eyes should look away from 6 meters to relieve the tension of eye muscles. At the same time, you should do eye exercises carefully every morning and afternoon. Minimize the time spent using electronic products for non-learning purposes.

the third is to keep the correct learning posture. The desk and chair at home should be adjusted to an appropriate height. The standard is that when sitting in a chair, the feet can be placed flat on the ground, the thighs can be perpendicular to the calves, and the elbows are 3-4 cm lower than the desktop when the back is straight and the upper arms are drooping. When studying, you should sit at your desk, not lie down or lie prone. When reading and writing, you should do "one foot, one punch and one inch", that is, your eyes are one foot away from the book, your body is one punch away from the desk, and your fingers are one inch away from the pen tip.

the fourth is to ensure a good lighting and lighting environment. Don't study in places where the light is too dark or too strong. During the day, natural light is taken in from the opposite side of the writer. When reading and studying at night, you should use both the room ceiling lamp and the desk lamp. The desk lamp should be placed in front of the opposite side of the writer, and the desk lamp should have sufficient brightness and suitable color temperature. Avoid using electronic products in dim light.

the fifth is to ensure sufficient outdoor lighting during the day. Under the premise of epidemic prevention and control situation and personal protection, as much as possible to the outdoor open place "eye" to bathe in the sun, it is recommended that not less than 2 hours a day. In the case that you can't go out for activities, it is recommended to take a sunshine bath on the balcony and window.

six is to ensure adequate sleep and reasonable nutrition. Primary school students should sleep 1 hours a day, junior high school students 9 hours and senior high school students 8 hours. Diet should be balanced, not picky eaters, not partial eclipse, not overeating, eat less sweets, eat more fresh fruits and vegetables.

Seventh, if the eyes are uncomfortable, rest or see a doctor in time. If there are symptoms such as dry eyes, foreign body sensation, burning sensation, photophobia, jealousy and eye pain during the online class, you should stop using the electronic screen. If the symptoms cannot be alleviated, you should seek medical advice in time. If parents find that their children have symptoms such as tilting their heads, squinting frequently and squeezing their eyes, they should take precautions and go to the hospital in time.