A typical blocked tear duct surgery may take 30-60 minutes, and may take only ten minutes if the surgery is minimally invasive or the tear duct placement is relatively smooth. Traditional nasal lacrimal sac anastomosis surgery with skin incision may generally take about half an hour or between half an hour and an hour if there is not much bleeding, but if there is more bleeding and bleeding needs to be stopped, it may take up some of the time and the surgery takes relatively longer. Doing nasal endoscopic endocapsular anastomosis, because the operation is only within a very small field of view, will increase the difficulty of the operation and the time will sometimes be relatively long. In addition, because most patients need general anesthesia for surgery, general anesthesia requires certain preoperative preparation, and postoperative anesthesia awakening time, which may sometimes take 1-2 hours.