A 10 year old child with 400 degrees of myopia can control the development of myopia by a combination of methods such as prescription glasses, application of low concentration atropine eye drops, improvement of eye habits, and more outdoor exercise. Children with 400 degrees of myopia should first be tested for the right number of glasses. They can wear frames, or functional glasses or keratoplasty lenses to control myopia. In addition to appropriate glasses, low concentration atropine eye drops can also be used for myopia control, which is effective for some myopic people, and should be used in strict accordance with the doctor’s instructions, and regular follow-up observation. Pay attention to the time and posture of eye use and the light of the eye environment. Avoid prolonged close-distance eye use and avoid using eyes in an environment with insufficient light. Avoid prolonged close-distance use of the eyes, and avoid using the eyes in an environment with insufficient light. After using the eyes for a period of time, you can relax by gazing into the distance and doing eye exercises. In addition, more outdoor exercise and sunshine can promote the release of dopamine in the body, which can help control the development of myopia.