The treatment of amblyopia is time-sensitive, the earlier it is detected and the earlier the intervention, the better the treatment effect. 2 years old is the critical period of visual development, 6-8 years old is the sensitive period, after 10 years old the treatment effect is extremely poor, and after 12 years old, the treatment is almost hopeless. Therefore, early detection of amblyopia in babies is of great importance. Babies can’t recognize the vision chart when they are young, so they can be judged by the “provocation experiment”. If the exposed eye has good vision, the baby will be quiet and continue to play, the provocation test is negative; if the exposed eye is amblyopic, the good eye is covered, the baby will cry and fuss or tear the coverings, the provocation test is positive, suggesting the existence of amblyopia, and should go to the hospital as soon as possible for examination and necessary treatment. In addition to the provocation test, parents can also pay attention to the following abnormalities, such as eye deviation, especially monocular strabismus, tilting the head to look at things, squinting or sticking very close to watch TV and read books. If there is, you should go to the hospital eye examination and confirm the diagnosis as soon as possible. When the baby is a little older, parents can buy a standard vision chart or children’s vision chart from a Xinhua bookstore, hang it on a well-lit wall, teach the baby to recognize the chart and learn to check the vision, and then let the child identify it at a distance of 5m. When checking, make sure to cover the eyes separately, not both eyes at the same time, to prevent monocular amblyopia from being missed; repeatedly and carefully check several times, if one vision is below 0.5 for several times, then you need to take your child to the hospital for further examination. It is generally believed that the best time to check is around 3 years old.