The development of a baby’s vision begins in the mother’s womb, so he is already light-sensitive at birth, but the baby’s brain is not yet able to process the information received by the eyes, and the shapes of objects are still very vague. As the brain develops, the baby sees things only more clearly. At first he can only see a little range, gradually he can see more and more, and eventually he will be able to take in the world around him. The information gathered by the eyes is utilized to understand and grasp the world around them and to assist in physical, intellectual and emotional development. A baby’s vision develops later than hearing, but earlier than the development of other organ functions in the body. There is a period of rapid growth before the age of 3, and by the age of 6 it is basically mature and close to adult level. So how to let the baby’s eyesight develop normally: because the baby at each age to interfere with the development of vision eye disease are different, to let the baby’s eyesight develop normally, we must ensure that interference with the development of vision eye disease can be found as early as possible, as early as possible treatment. Babies will not tell their mothers and fathers that they have poor eyesight, and most eye diseases in children are not visible on the surface, so the best way is to give them to a professional eye doctor for regular checkups, and to intervene as soon as possible when problems are detected. The method and content of the checkups are different for newborns, infants and toddlers, and preschoolers.