An 8-year-old child with 100° myopia should be taken seriously because 8-14 years old is a sensitive period for children’s visual development and a time of rapid growth, so comprehensive measures must be taken to slow down the development of myopia. First of all, a visual health file should be established, with detailed records of the child’s age, gender, height, weight, eye axis, corneal curvature and visual refractive power, etc. The visual acuity should be reviewed once every six months and the file should be updated annually. You can combine low-concentration atropine drops with eyeglass prescription. Pay attention to the correct method of using atropine drops to prevent side effects, ensure more than one and a half hours of outdoor activities every day, bathe in sunlight, while preventing ultraviolet damage, stay away from electronic products, work at close range, achieve relaxation, and ensure enough sleep time every day. Eat more foods rich in vitamin A, vitamin C and vitamin E, and eat less sweets and carbonated drinks.