A child’s visual acuity of 4.7 does not correspond to the exact degree of myopia, and should go to the hospital for optometry to determine the exact degree of myopia. A child’s visual acuity of 4.7 refers to a visual acuity value of 4.7 obtained through a visual acuity meter examination. according to the international decimal visual acuity scale, normal visual acuity is generally above 1.0, and according to China’s five-point visual acuity scale, the visual acuity is above 5.0, and the visual acuity of 4.7 indicates that the vision is lowered. Reduced visual acuity may be due to myopia, or it may be related to refractive errors such as hyperopia and astigmatism. In the case of hyperopia, it is also important to determine if the cause is physiologic, depending on the age of the child. In the case of myopia, it is necessary to determine whether it is true myopia or pseudomyopia and to correct it accordingly. Loss of vision in children may also be caused by eye diseases. If this is the case, you need to actively treat the original disease. Children with visual acuity of 4.7 need to go to a regular hospital for professional examination.