Double eyelid surgery can be divided into: buried suture method, suture method and incision method. 1. Suture method When the results of this type of surgery are not good, they can be corrected with the incision method. For those who are not satisfied with the shape of the eyelid, the knot can be cut within a few days after surgery to return the original single-lid face. Post-operative swelling is minimal and there are no visible incision scars. The disadvantage is that the upper lid crease becomes shallow or even disappears after the adhesions between the eyelid and the lid plate are loosened, and the surgery cannot remove the loose upper lid skin and excess orbital fat at the same time. This method is suitable for those with large eye fissures, thin eyelids, little fat, and no laxity in the upper lid skin. 2. The buried wire method involves burying the wire knot between the dermis and the lid for permanent retention, which is a stronger bond than the suture ligation method, but the correct anatomical level must be mastered. The disadvantage of this method is that the buried node can be easily loosened and the lid can disappear, but the node can be buried again to form a strong adhesion. This method is suitable for those who have thin subcutaneous tissue on the upper lid and whose orbital fat is not prominent. 3. The incision method involves cutting the upper eyelid skin open, creating a heavy eyelid that is anatomically similar to the natural one. The disadvantage is that postoperative swelling is noticeable, with some recipients experiencing long swelling and leaving a subtle incision scar early on. This method is suitable for any type of single eyelid eye, allows for the treatment of both excess upper lid skin and fat, and provides ideal results.