4-year-old children with poor vision, temporary does not need treatment, it is recommended that the interval of 3 ~ 6 months, regular hospital eye examination, if the poor vision has not changed, or other symptoms, it is recommended to consult a doctor in a timely manner. The eyes of 4-year-old children are in the state of development, vision is not yet well developed, poor vision is a normal phenomenon, with the growth of age, vision will also improve. If the child has other symptoms in addition to poor vision, such as amblyopia, strabismus, etc., then this is not normal and further diagnosis is needed. If the cause of your child’s poor vision cannot be determined, it is important to go to a regular hospital in time for examination and reasonable treatment according to the characteristics of the manifestation and the cause of the disease.