The normal visual acuity of children varies from one age to another. children’s visual acuity is checked at the age of about 3 years old and is usually around 0.6, at the age of about 4 years old it is around 0.8, at the age of about 5 years old it is between 0.8 and 1.0. at the age of 6 years old and above, the standard of normal visual acuity is 1.0 or even more than 1.0. If a child’s vision is significantly lower than that of children in the same age group or the difference in vision between the two eyes is more than 2 lines, we need to pay attention to the need to actively go to the hospital for optometry, especially according to the need to choose dilated pupils, optometry to clarify the degree of refraction, after which you can correct according to the degree of refraction, in most cases may need to wear glasses to be able to correct vision.