The child is eight years old myopia 400 degrees, patients can wear glasses to correct myopia, daily should also develop good eye habits. Children eight years old myopia 400 degrees belongs to moderate myopia, combined with the child’s age, myopia is more serious, parents need to pay attention to the treatment, take the child to the hospital in a timely manner with ciliary muscle paralyzing agent to do pupil dilation after the optometry, to get a more accurate refractive error to give the child with the right frames of spectacles to correct myopia, to improve visual acuity. Myopic children also need to develop good eye habits in daily study to avoid myopia progression and development of high myopia. Therefore, parents should look at fewer or no electronic devices, regularly look away from home, look at green plants and pay attention to eye rest every day to stop myopia from deepening. Myopia patients are advised to consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.