How many degrees of myopia can increase from the age of 8 to the age of 18 varies from person to person and is not exactly the same, and has a certain relationship with the patient’s eye habits. If an 8-year-old child is nearsighted, if he pays attention to his eyes, develops good eye habits, and wears frames or corneal reshaping lenses correctly, the degree of myopia will be relatively stable or increase slightly, and the degree of nearsightedness will not increase too significantly in general. If the child continues to use the eyes incorrectly, without the correct prescription or prolonged overuse of the eyes, it can cause over-adjustment of the eyes, and myopia can gradually deepen. 8-year-old myopic children need to control myopia, and myopia should be controlled within 600 degrees. Children with myopia starting at the age of 8 need to control their myopia to 600 diopters or less, because myopia above 600 diopters is considered high myopia, and patients with high myopia can develop fundopathy, which can cause irreversible visual impairment. It is recommended that children with myopia seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment and care.