Strabismus, as the name implies, is a misalignment of the eye. In a normal person, both eyes remain relatively parallel and focused on the same target. In the case of strabismus, both eyes do not see the same way, with one eye looking at the object and the other eye looking away from the target, in a skewed state. Folk have different names for strabismus, such as “squinting eye”, “fighting eye”, “opposite eye”, “floating eye”, etc. The skewed eye not only affects one’s appearance, but also causes damage to the visual function and leads to psychological disorders. It can also lead to psychological disorders, which can have adverse effects on learning, choosing a job, choosing a spouse and some special jobs. After the visual function is damaged, if timely treatment and correction can still restore normal binocular vision, restore fine stereo vision function.