Rigid IOL (PMMA), whose optical diameter is generally 5.5mm, requires an enlargement of the original suprachoroidal incision to 5.5mm during implantation, has a certain amount of postoperative astigmatism and a relatively high incidence of distant posterior capsule clouding (about 20%), and is suitable for cataract patients in the general population. Folding IOL, also known as soft IOL, has an optical diameter of 6mm and its optical surface is soft and foldable, thus it can be implanted into the capsule smoothly with only a 3.2mm incision, which is truly a small incision surgery for ultrasound emulsification, with almost no astigmatism and more ideal vision recovery after surgery. lens. The specific advantages are: 1. Smaller surgical incision. 2. 2. There is almost no astigmatism after surgery, and the recovery of vision is more ideal. 3.Wide application, suitable for all patients who can do ultrasound emulsification surgery. 4.The crystal material has excellent biocompatibility after special treatment, and the reaction after surgery is light. 5.Low incidence of posterior obstruction.