Generally referred to as 1.0 or 1.0 or more vision is normal vision, now children’s vision check 1.0, basically no problem, but still need to pay attention to the gradual growth of vision development, generally 8-9 years old, vision only developed into a normal level, can reach 1.0 or 1.0 or more, before 8-9 years old does not need to be particularly good vision. Generally speaking, a three-year-old’s vision is 0.5, a 4-5-year-old’s vision is 0.6, a 6-year-old’s vision is 0.7, and a 7-year-old’s vision is 0.8, which is considered normal as long as it does not fall below the lower limit of the vision standard for each age group. Although the child’s visual acuity is now 1.0, if it was at the age of 5-6 years old, it should not have had such good visual acuity, but to reach 1.0, but it is necessary to be alert, because the development of vision is from farsightedness to orthophoria and then myopia, too early to reach the state of orthophoria, it is possible that the development to myopia will be earlier, so further examination is needed to determine whether there is a farsighted reserve. If there is no farsightedness reserve, although the current vision is very good, the next development trend may only develop to myopia, so we need to pay special attention.