The eye is an important sensory organ for human survival, and about 90% of the information people obtain from the outside world comes from the eye. The eye is the window to the soul, and is the most rapid tool for people to exchange ideas and transmit information. The visual process is a complex process, and the establishment and perfection of visual function is also more complex, when infants are born, the visual system, like all systems of the body, is not yet well developed, and vision is poor. If the development of the visual pathway from the eye to the brain is affected by some undesirable factors during this period, amblyopia may occur. Some children are born with a high degree of hyperopia, astigmatism or myopia in both eyes, and if they do not wear appropriate glasses in time, the objects they see are always blurred, so that the neural pathway from the eyes to the visual center of the cerebral cortex is poorly developed, resulting in amblyopia. Some attentive parents may find that their children like to read books very close to each other, watch TV, often squinting to see things, the child’s response to the surrounding environment is worse than other children of the same age. 2, refractive error Some children have refractive error, but a low degree, a high degree, this is refractive error. These children refractive error is clear in one eye, while the high degree of the eye to see things is blurred, the two eyes at the same time to see objects in the brain due to the formation of the visual cortex of the object image clarity is inconsistent, the brain can not fuse them into one, so the visual center actively suppressed the blurred image, and over time the eye with a deep degree of amblyopia become amblyopic. Children with refractive amblyopia have one eye that sees things clearly, so it is usually difficult for parents to detect any abnormalities, and they are often discovered only when they go to school or have their vision checked when they are older. 3, monocular strabismus There are many types of strabismus. Generally speaking, children with alternating strabismus in both eyes do not develop amblyopia, but they cannot develop advanced binocular vision: stereo vision, while children with frequent strabismus in one eye have their visual development affected by the strabismus because the brain often actively inhibits the nerve impulses transmitted by the strabismus in order to overcome the diplopia and confusion generated by the strabismus. 4. Formal deprivation means that for some reasons, such as congenital ptosis, congenital cataract or corneal leukoma, the light stimulation entering the eye is affected in the early stage of birth, so that the eye cannot produce normal visual impulses and no normal visual impulses are transmitted to the visual center, so that the visual development of the eye is affected, thus producing amblyopia. Our ophthalmologists have done a lot of research and found that the prevalence of amblyopia around the world is mostly in the range of 2%-4%. The danger of amblyopia is that the patient not only has low vision, but also does not have perfect binocular vision and precise stereo vision. Amblyopia is a developmental disorder, and in the stage of visual development has plasticity (i.e., the body’s ability to respond to external influences), the younger the age, the stronger the plasticity, the critical period of visual development is 0 to 3 years old, and the sensitive period is 0 to 12 years old. Therefore, the earlier we intervene and treat patients with strabismus and amblyopia, the better the treatment effect will be, while adults have no hope of cure after the developmental period is terminated. Therefore standardized eye examinations for infants and children are very important and necessary. Our ophthalmologists, especially pediatric ophthalmologists, have been actively trying to do a lot of work. Therefore, every parent should not only pay attention to the healthy growth of their child’s body, but also to the healthy development of their child’s eyes, observe carefully, and visit the ophthalmologist in a timely manner once clues are found, and if no abnormalities are found, they should also seek regular checkups from the ophthalmologist so that early detection and early treatment can be achieved, so that each child not only has a strong body, but also has bright eyes, good vision and fine stereopsis In this way, each child will not only have a strong body, but also have bright eyes, good vision and fine stereopsis, so that they will have the conditions and ability to engage in various fine jobs in the future without any regrets.