Cataract surgery is not a big risk. Cataract is the most common disease that causes vision loss in patients in our country, and it is generally common among middle-aged and elderly people. It is caused by the decrease in transparency of the lens inside the eye, which blocks the refraction of light into the inside of the eye, and it can be treated through surgery by removing the cloudy lens and implanting a transparent IOL to restore the eyesight. Cataract surgery technology is very mature and the risk is not big, but any surgery has risk, the possible risks after cataract surgery are mainly endophthalmitis, corneal endothelial dysfunction, explosive suprachoroidal cavity hemorrhage and so on, but the probability of occurrence is not big. It is recommended that regular hospital visits, detailed preoperative examination and preparation, and regular postoperative review can reduce the likelihood of the occurrence of surgical risks.