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Visual loss after non-ocular surgery(VLNOS)includes postoperative visual loss and perioperative visual loss after non-ocular surgery. The former accident consists of the blindness during a surgery or after a surgery, and the latter accident shows the acute visual loss in perioperative period. VLNOS can be appeared in a prone spinal surgery, cardiopulmonary bypass surgery, head and neck surgery, and facial micro-plastic injection treatment, which is a rare, extremely serious complication. VLNOS is divided into predictable and unpredictable condition. Doctors of related subjects have pay attention to VLNOS, and begin to study the possible reasons, and take positive precautions.