Newborn babies, all parts of the eye tissues and functions are immature, can only see very close objects, about 18cm, at this time belongs to farsightedness; 3 months, the infant’s visual acuity is about 0.01-0.02, can follow the moving small objects, but also can identify different colors; 5-6 months the infant’s visual acuity is about 0.04-0.08; 7-8 months, infants can look at a long time in the At the age of 1 year, the visual acuity is about 0.2-0.3; at the age of 3 years, the visual acuity is about 0.5, at which time there are fine visual reflex movements; the lower limit of visual acuity for children aged 4-5 years is 0.6-0.7, that for children aged 6 years is 0.7-0.8, and that for children aged 7 years and above is 1.0, when the visual acuity is close to that of adults. In addition, vision screening can be done by different methods depending on age. For example, for babies under 18 months old, a striped vision chart can be used; for babies between 18 months and 3 years old, a spot vision disk can be used; and for babies after the age of 3 years old, a standard vision chart can be used for screening. Usually, the vision examination needs to be carried out once every 3-6 months, so as to keep abreast of the children’s vision situation. If the baby’s vision lags behind the normal children’s vision by a large amount, it is necessary to take the child to the regular eye hospital for examination. The most critical period of eye development is before 3 weeks, and the sensitive period is before the age of 9. During this period, the eyes should be protected and problems should be found and treated in time. Daily, pay attention to eye hygiene, children should maintain 2-3 hours of outdoor activities every day, conducive to eye development. Do not over-exert their eyes, ensure adequate sleep, eat a comprehensive diet, eat less spicy and stimulating foods, eat more fruits and vegetables, wear sunglasses when going out in the sun to reduce glare stimulation, to maintain eye health.