A 10 year old child with 200 degrees of myopia after dilating the pupils is mostly myopic, and the child needs glasses to correct the myopia and improve the vision, or else visual fatigue will easily occur and develop into high myopia. Currently, true myopia can not be reversed, myopia can lead to vision loss, generally the higher the degree of myopia, the more pronounced the loss of vision. 200 degrees of myopia can interfere with the child’s vision, the child can be corrected through optometry myopia, improve vision. If the child does not get the glasses in time, the long-term blurring of vision will easily lead to the growth of myopia and the development of high myopia. Usually, children also need to avoid reading books and playing computer for too long, do not hunch over when reading books, and do not get too close to the computer screen when watching TV. Children can also increase outdoor exercise for two hours a day and pay attention to eye hygiene. It is recommended that children with myopia consult a doctor to assess their condition and follow the doctor’s instructions for treatment.