Strabismus is commonly known as “glance”, which means that when a person looks at something with one eye, the other eye is shifted to the side. Strabismus mostly starts in preschoolers, which not only affects the image of children, but also seriously impairs their normal eye development and can easily lead to amblyopia. Young children’s eyes are small and highly hyperopic, so they have strong accommodation. When looking at near objects, they rely on the regulation force to overcome, and the bilateral eyeballs approach inward, which is called convergence. If both eyes look at near objects for a long time, the two eyes are bound to produce strong convergence, and over time, the muscles that turn the eyes inward are especially developed, while the muscles that turn outward are relatively weak, forming what we call glance eyes. The fundamental prevention of strabismus in children is to prevent them from looking at things that are too close to them. For infants in the cradle, parents should not hang their children’s favorite toys too close; for children who can walk, because they can get toys, parents should always pay attention to keep them from holding too close to the eyes; for preschoolers, parents should take them more outdoor activities, and should also intentionally guide them to look at distant things. It should also be noted that: installing lights in the cradle or turning on long lights for children at night are not conducive to preventing strabismus in children.