A visual acuity of 1.0 in a child means that the child’s vision is developing normally. A visual acuity of 1.0 usually refers to central vision, with normal visual acuity of 1.0 or better. It is usually tested by an E-scope, which is equivalent to 5.0 on the standard logarithmic visual acuity scale. The vision of a newborn baby is poor and develops to normal as the child’s body develops. Around the age of 5 to 7, most children’s vision can be tested at 1.0 or above. It is recommended that children’s vision be checked every three to six months. If abnormal vision development is detected, it is necessary to go to the hospital in time for a detailed examination to clarify the specific cause and make corrections in time if necessary.