1. Canthoplasty: Canthoplasty is also called epicanthal fold correction. There are many ways to apply it clinically. The more commonly used methods are: "V-Y" suture method, "Z" shaping method and four-flap method. The first two are suitable for mild epicanthal folds, and the latter are suitable for wider epicanthal folds. No matter which method is used, a certain scar will be left at the incision after the operation, which will generally not be obvious after 3 to 6 months. 2. Lateral canthoplasty: Lateral canthoplasty is a surgery that incises the lateral canthus of the eye and lengthens the horizontal length. This is a surgery to incise the skin and mucous membrane of the outer canthus of the eye. Commonly used ones include Von Ammon canthoplasty and Fox canthoplasty. In addition, there is simple incision and suturing, which is simple to operate, but it is rarely used clinically because it is prone to recurrence after surgery.