Double eyelid surgery is also known as blepharoplasty, and the main surgical procedures include buried double eyelid, open double eyelid, and Korean three-dot double eyelid. The procedure is relatively simple and does not involve cutting the skin, but only using a suture to sew the dermis of the skin and the lid plate or the levator muscle together along the drawn eyelid line, relying on the scars formed by the surgical trauma. The scar adhesions formed by the surgical trauma are used to form double eyelids. It is generally suitable for young people with thin eyelids and no significant laxity, and the duration of the effect varies from one to several decades, depending on the individual. Korean double eyelid is usually done by making 3 tiny incisions of 1-2mm on the upper eyelid, removing a small amount of fat and orbicularis oculi muscle, and then putting sutures through each of the 3 incisions and tying them with a live knot, and then adjusting the curvature of the lid edge before suturing and tying them in turn. This procedure is mainly suitable for young and middle-aged patients who do not have heavy laxity in their upper eyelids, and the maintenance effect can range from several years to decades.