People usually take the vision of not less than 1.0(5.0) as the criterion for judging normal vision, but this criterion is not completely applicable to young children. Because preschool children's eyesight is still developing, it is relatively stable after 6 years old. For children of different ages, different standards should be adopted to judge whether their eyesight is abnormal.
Usually, the visual acuity of 3-year-old children is ≥0.5(4.7), 4-year-old children is ≥0.6(4.8), 5-year-old children is ≥0.8(4.9), and 6-year-old children is ≥ 1.0(5.0), that is, their visual acuity is normal. In addition, children's development is different, and the vision standard can only be used as a reference, which should be judged by comprehensive optometry results. If the child's vision is lower than the lower limit of the normal vision of his peers, or the difference between his eyes is more than two lines, it means that his vision is abnormal.
Extended data:
Children's social ways are gradually informatized, and it is not feasible to completely eliminate children's contact with such devices. Therefore, it is very important to take preventive measures in the early stage. Don't watch TV, mobile phone, iPad, etc. Suitable for children before 2 years old. Children in kindergarten should watch TV for no more than 20 minutes at a time, and should use less electronic products before 10.
10 years old is the key point of vision, and it is very important to develop good eye habits before 10 years old. If children develop good eye habits before 10 years old, it will be much easier to maintain such eye habits in the future, and the chance of suffering from myopia will also decrease. If you can't develop good eye habits before 10, it will be more difficult to correct them later. Not only will the prevalence of myopia increase, but the degree of myopia will also increase significantly.
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