When you are in junior high school, you are in the process of developing fast, growing your body, and your eyes as well. In addition to the problems we talked about before to pay attention to, the pressure of learning and unconsciousness phenomenon is also more serious, play computer, play more and more cell phones, which not only aggravates the eye fatigue, is also extremely bad for the body. As the saying goes: early to bed and early to rise good body! Often stay up late has a great impact on vision, on the eyes, extreme fatigue, no proper rest, that myopia deepened needless to say. For example: you walk for 3 hours in a row, feet must be very sore, if 3 hours are looking close, eye fatigue is similar, will be very sore, swelling, tears, etc.. So, you can’t stay up late, pay attention to rest, and it’s best to sleep before 23:00. Yang Liang Yan, Ophthalmology Department, Ningbo Sixth Hospital Due to the popularity of technology, there are many teenagers who play computer games and cell phones for a long time. Some teenagers have their own cell phones and computers, and they can’t control them, so it’s hard for parents to manage when they play. Cell phones are handed over to parents before going to bed. Speaking of cell phones, many people currently use cell phones to read novels, that is extremely harmful to the eyes, so small words, on such a small screen, the screen is bright, and very close to the eyes, look at half an hour of cell phone novels, than reading 2 hours of textbooks also hurt the eyes. In terms of vision damage, the most damaging to the eyes is to play cell phones, long time playing cell phones is very harmful; then the computer, computer screen from the eyes at least half a meter, so lower than the cell phone damage to the eyes; then the television, television also requires a distance of more than three meters. The last is to read paper books, writing. So the first three habits that hurt the eyes should be strictly controlled, otherwise the occurrence and deepening of myopia is inevitable. Myopia in adolescents occurs and deepens the fastest between the ages of 11 and 16, during this period is also the body grows, the rate of myopia deepening during this period, less than 50 degrees per year is relatively normal, at this time is called developmental increase.