Many children with strabismus have vision problems. After surgery, many parents ask: Will the surgery cause vision loss? Will vision improve after surgery? In fact, strabismus surgery has nothing to do with vision and will not affect the change of vision. By vision, parents mean the ability to see clearly. Light enters the eye through the refractive medium (cornea, crystal, vitreous), reaches the retina and forms nerve impulses, which are then transmitted to the central nervous system to form vision. Therefore, the good or bad vision is related to the refractive media lesions of the retina and the eye. Strabismus surgery is performed by adjusting the extraocular muscles to help restore the eye to its proper position, so that both eyes can see at the same time, so that the child can see without double vision and have a sense of distance and near. The surgery itself does not treat the retina or the refractive media, so the original vision problems will remain after strabismus surgery. However, in the early stage after strabismus surgery, because the eye is still red and swollen, there is a lot of secretion, and many ointments will be applied, so the child may see somewhat blurred, which usually recovers after a period of time.