1. The buried suture method (also known as the polymer molding method) is a method in which sutures (or polymer sutures) are directly buried between the skin and the lid, causing the upper eyelid skin to adhere to the lid to form a double eyelid surgery. This method is easy to perform, less traumatic, does not leave scars, quick to reduce swelling, and does not require stitching, and is more suitable for young people with thin eyelids, long eye fissures, and no loose skin; it is less suitable for people with thicker eyelids, loose skin, and older people, and has the potential to disappear from double eyelid surgery. 2, cut double eyelid surgery method, is a permanent double eyelid surgery, it is through the incision, remove loose skin, orbicularis oculi muscle and hypertrophic fat, under direct vision direct skin with orbicularis oculi muscle or upper eyelid muscle tendon membrane sutured together to form double eyelid surgery. This method requires a skin incision and is slightly more traumatic, but the incision allows for structural adjustments to the upper eyelid, and the results are reliable and long-lasting, suitable for single eyelids in all cases. It takes slightly longer to reduce swelling and the wound will leave a linear scar. 3. The pressed double eyelid method, similar to suturing, is a procedure in which the mucosa is sutured through the skin to form a double eyelid. This method is similar to the suture method, in which the mucosa is sutured to the skin to form the double eyelid surgery. Because of the continuous full-layer suturing of the upper eyelid, the vascular reflux is blocked, so the swelling of the upper eyelid is obvious, and the swelling is slow to go down. There are several types of double eyelid surgery, but there are many variations in the various types, adding up to no less than a hundred. Regardless of the method used, the principle is mostly the same. In clinical practice, it is necessary to choose the surgery according to the conditions of the patient (such as lid shape, face shape, etc.), and not to apply one method uniformly, but to make it different from one person to another, so that the effect made can meet each situation and highlight the personality and achieve perfect results.