Strabismus surgery is an invasive corrective treatment, and sequelae such as undercorrection or overcorrection of strabismus or scar granuloma at the wound, endophthalmitis and suture detachment may occur after surgery. 1. Strabismus surgery is characterized by inaccurate measurement of the degree of strabismus due to the lack of cooperation in measuring the degree of strabismus before the surgery, especially in children, which leads to inaccurate measurement of the degree of strabismus, and therefore, there is a lack of precise control of the amount of surgery in the surgical design and surgical process, and overcorrection or undercorrection may occur in the case of inexperienced surgeons. 2. As strabismus surgery is an invasive surgery, during and after the surgery, various surgical treatments, improper care and personal physical condition may cause wound scarring and granuloma, which may seriously affect eye movement and visual function. 3. Although strabismus surgery does not involve the inner eye, but for the thin sclera operator’s operation is not fine enough, it may lead to the risk of endophthalmitis caused by the suture cutting and other penetration into the inner eye. 4. Due to irregular knotting of sutures, etc., the sutures may fall off after surgery, which may show a large degree of strabismus, but this is rare. It is recommended to choose a qualified and experienced surgeon for strabismus surgery, and to follow the doctor’s instructions for postoperative care and training.