Children 7 years old visual acuity 4.8, may be myopia, amblyopia, congenital cataracts and other factors, the patient should go to the hospital in time for relevant examinations, symptomatic treatment, the specific whether to return to normal with the patient’s condition. 1. Myopia: 7-year-old children with visual acuity of 4.8, may be myopia caused by vision loss, the patient can wear frame glasses, corneal contact lenses, etc. under the guidance of the doctor to correct myopia, improve vision. 2. Amblyopia: A 7-year-old child with visual acuity of 4.8 may also be due to amblyopia. Under the guidance of doctors, patients can take optical correction, if necessary, combined with masking therapy and other ways of treatment to stimulate the development of amblyopia eye, improve vision. 3. Congenital cataract: A 7-year-old child with visual acuity of 4.8 may have congenital cataract. The patient can choose the appropriate way of treatment according to the child’s age and the degree of disease under the guidance of the doctor, such as cataract ultrasonic emulsification combined with IOL implantation. In addition, children should be allowed to participate in more outdoor activities, avoid excessive use of eyes, and develop good eye habits. Children with vision loss are advised to consult a doctor to assess their condition and follow the doctor’s instructions.