The first is the cosmetic impact, which is the main motivation for making patients seek medical attention. More importantly, strabismus affects the visual function of both eyes, and in severe cases there is no good stereo vision. Stereopsis is an advanced visual function that only humans and higher animals have, and it is one of the prerequisites for people to do fine work. Without good stereoscopic vision, people will be greatly limited in their studies and employment. Most people with strabismus also have amblyopia. As a result of long-term gaze in one eye, the other eye will have disuse vision loss or stop developing, and later, even with proper glasses, vision will not be normal. Strabismus in childhood also affects the development of the entire skeleton, such as the compensatory head position of congenital paralysis strabismus, which causes contracture of the neck muscles and pathological curvature of the spine, and asymmetrical facial development.