12 year old child more than 200 degrees myopia need to go to the hospital for relevant examination, myopia is divided into true myopia and pseudomyopia, need to be based on the specific circumstances of vision correction. The 12-year-old child more than 200 degrees of myopia need to vision correction, timely medical treatment for dilated optometry, optometry has degrees of true myopia, by consulting the doctor to choose the right glasses. After wearing glasses can reduce the appearance of visual fatigue, effective vision correction. In addition, 12-year-old children more than 200 degrees of myopia is not excluded from pseudomyopia, usually due to bad eye habits and excessive use of eyes caused by vision loss, is not the true meaning of myopia, through the dilated pupil after the optometry does not have degrees, can be adjusted through the standardization of eye use, can make vision recovery. In daily life, children also need to reasonably arrange eye time to avoid visual fatigue. It is recommended that children with myopia consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.