A 9 year old child with 100 diopters of true myopia needs eyeglasses, but a 9 year old child with 100 diopters of pseudomyopia does not need eyeglasses. When a 9-year-old child has 100 degrees of myopia for true myopia, he/she needs to wear glasses to correct it. Parents can choose the right prescription glasses for their children to prevent further deepening of myopia, and also make their children’s daily vision to see more clearly without affecting their study and life. When a 9-year-old child has 100 degrees of myopia as pseudomyopia, he or she does not need to wear eyeglasses for the time being. Pseudomyopia is mostly caused by children’s bad eye habits, parents can first correct the child’s daily life bad eye habits, every day to urge the child to more far away, look at green plants, let the eyes rest, etc., the patient can be restored to the state of orthopia. However, if patients with pseudomyopia continue to use their eyes with fatigue, it may develop into true myopia. It is recommended that children with myopia should consult a doctor in a timely manner to assess their condition and follow the doctor’s instructions for treatment.