At 8 years of age, visual acuity should be at least 1.0, which translates to a logarithmic visual acuity scale value of 5.0. At 8 years of age, a child’s vision is essentially mature, so in line with an adult’s central vision, visual acuity in both eyes should be at least 1.0, which translates to a logarithmic visual acuity scale with an index of 5.0. If the visual acuity is below within the normal range, it is considered to be vision loss. Under normal circumstances, the visual acuity of both eyes should be consistent at the age of 8. If the visual acuity of one eye is low while the other eye is within the normal range, it is also abnormal and requires relevant corrections and timely improvement of bad eye habits. After the age of 8, children should go to the hospital regularly for optometry and visual acuity testing, and be evaluated according to the visual acuity value. If there is myopia, amblyopia or astigmatism, it needs to be corrected at an early stage in order to avoid affecting the visual acuity.