Before the surgery, parents should bring all the required pre-operative examination information and ensure that the child does not have a cold or fever. Because the child is healthy and in good condition to be able to do general anesthesia; once the child has a cold, fever or diarrhea, he or she will not be able to operate. In addition, do not be too nervous psychologically, strabismus surgery is a common surgery in ophthalmology, and it does not affect the child’s body much. In addition, before strabismus surgery, eye drops are needed. This is to prepare for the strabismus surgery itself. Antibiotic eye drops should be used three days in advance, mainly to sterilize the conjunctival sacs of both eyes and to prepare for the sterility of the surgery.