Although cataract surgery is relatively standardized and mature, infection, postoperative corneal edema, posterior cataract and lens dislocation may occur. Currently, cataracts are mainly treated with ultrasonic emulsification and IOL implantation, which is a relatively mature and safe technology, but there are also some risks. First of all, it is a traumatic surgery, and the eyes are in a fragile state after the surgery, which is prone to microbial infections in the case of improper care and unclean environment. Inadequate preoperative examination or large damage to the corneal endothelium during surgery may result in a loss of corneal endothelial cells, which may be manifested as corneal edema, etc. In addition, due to the residual cornea after surgery, the cornea may not be as strong as it should be. In addition, due to the abnormal proliferation of the residual lens cortex after surgery, posterior cataracts may occur leading to vision loss, requiring laser treatment to tear the posterior capsule membrane; postoperative dislocation of the IOL may occur in the event of impact or trauma. Therefore, it is recommended that cataract surgery should be performed in a regular and qualified institution, with regular postoperative checkups and protection as prescribed by the doctor, and that any abnormalities should be resolved in a timely manner.