8-year-old child visual acuity 4.7 is 0.5, significantly lower than normal children of the same age, should be timely to the regular eye medical institutions, improve the dilated pupil medical optometry and other checks, if the refractive error is caused by the need for timely correction. Under normal circumstances, 8-year-old children’s visual acuity should be more than 1.0, visual acuity 4.7 is significantly lower than normal visual acuity. At this point, a medical dilated optometry should be performed in a timely manner to clarify whether there is a refractive error and the specific degree of refractive error. If the vision loss is caused by refractive errors such as myopia, you should follow the doctor’s advice to choose frame glasses or other ways to correct the vision, so as not to further deepen the degree. The visual acuity of 4.7 for an 8-year-old child is lower than normal, and there are many reasons for vision loss. Parents are advised to take their children to regular hospitals for examination and treatment in a timely manner in order to avoid delaying the condition.