Parents of an 8-year-old child with 100 degrees of myopia should first make it clear that 100 degrees of myopia has been formed and cannot be reversed. The next thing you need to do is how to slow down the deepening of myopia. Parents should take their child to a regular hospital eye exam, do the first health file establishment, and review the vision every six months to a year to replace the glasses according to the changes in the reading. Parents should supervise or accompany their children to go outdoors for at least one and a half hours a day, no less than 14 hours a week, soaking up the sun while avoiding exposure to ultraviolet light. Minimize the time spent using eyes at close range as much as possible, take a 10-minute break every 40 minutes, and keep looking far away; children under 8 years old are recommended not to use electronic products, and elementary school students should not sleep less than 10 hours. Proper reading posture and scientific eye habits are very beneficial in slowing down the development of myopia.