A systematic eye examination should be done before the age of 3! It is necessary to have a dilated eye exam. When children have vision problems, it is usually not easy for parents to detect them, especially for children with low vision in one eye, it is usually difficult for parents to detect the presence of visual impairment and often misses the time for treatment. Therefore, it is necessary for preschoolers to have a systematic eye examination. It is generally believed that the visual system matures at the age of about 3 years old, the visual development is still plastic at the age of 3 to 8 years old, and the visual development is completed at the age of 8 to 9 years old. if amblyopia and abnormal stereo vision are found only at this time, the best time for correction has been lost. above the age of 12 years old, the visual development of both eyes is basically mature, and the majority of patients cannot obtain satisfactory treatment results. After adulthood, there is little hope of curing amblyopia. Children should have at least one systematic eye examination before the age of 3, including visual acuity examination and dilated pupil examination. The dilated eye exam helps to exclude pseudomyopia and helps doctors and parents to understand the best corrected visual acuity and true refractive error of the child’s eyes, which is important for early detection of amblyopia and refractive error. Six types of performance indicate eye problems Children before the age of 3 years who have poor vision are often unclear and do not cooperate well with vision examinations, so it is important for parents to observe carefully. If your child shows the following signs, you need to pay attention to them and take them to a professional eye hospital for examination as soon as possible. 1.The baby does not respond to light, and the face does not turn to the bright place. 2, indifferent to the expression of the surrounding things, the family does not speak or toys do not make a sound when the baby can not cause excitement. 3.Infants with very low vision often have the habit of squeezing their eyes with their small hands. 4.Toddlers who can walk move awkwardly, often stumble and fall, and cannot avoid obstacles in front of them. 5.The eyes look out of place. For example, they sway rhythmically or turn aimlessly like a pendulum. 6. Focusing on the target with only one eye, squinting when watching TV, or reading too close to the target. When to wear glasses depends on the degree of myopia After the child is equipped with myopia glasses, is it always wear or wear when looking far, not wear when looking close? This is a question that many parents ask. If your child is mildly myopic and the degree of myopia is similar in both eyes, you may not wear glasses when using your eyes at close range. For example, a child with 300 degrees of myopia, his close distance is 33cm, reading books without glasses is perfectly fine, but if you put on a pair of 300 degrees of myopic glasses when reading, the lens will have to adjust 300 degrees at the same time, long time close reading but may accelerate the further development of myopia. If the child has different degrees of myopia in both eyes, and the difference is large; or simple myopia in one eye, the other eye has astigmatism, astigmatism in more than 100 degrees; high myopia patients, should often wear glasses. Parents should let their children do not always stay at home, appropriate to increase outdoor sports especially ball games, such as table tennis, badminton, tennis, etc.. During the ball game the child’s eyes will quickly follow the coming and going of the ball, so they can be fully adjusted and relaxed, which has a positive effect on the prevention and treatment of myopia. Carrots, tomatoes, green vegetables, egg yolk and milk are rich in vitamin A, vitamin B1, vitamin B2 and calcium, which are beneficial to eye health.