1, what is canthal redundancy canthal redundancy is more common in the East, its main feature is the webbed crease above the inner corner of the eye, partially or completely cover the inner canthus, affecting the beauty. The presence of the canthus not only widens the distance between the inner canthus and flattens the nasal bridge, but also blocks part of the vision and impedes visual function. The canthus can be divided into two categories: congenital and acquired. The congenital form is the most common, and is a normal racial characteristic of Mongolians. The congenital canthus is often bilateral and has a degree of heredity, with individual deformities such as ptosis and microphthalmos. Acquired canthus is usually secondary to trauma or burns and is often associated with damage to adjacent tissues. In 1932, Von-Ammon suggested that the canthus was caused by too little skin on the eyelid and too much tension in the vertical direction of the inner canthus. Therefore, the structure of the area needed to be rearranged rather than just removing the excess skin, and this idea was an important breakthrough in the treatment of the medial canthus. Theoretically, the key to releasing the tension caused by the presence of the crease is to choose a surgical procedure that will lengthen the eye fissure and then cut the skin crease to loosen the skin. However, the condition is not simply a tension of the skin, but also a tension caused by the orbicularis oculi muscle and its ligaments, so it should also be cut at the same time. 3, what is suitable to receive canthoplasty The treatment of canthoplasty is mainly surgical correction, because childhood is in a stage of rapid growth and development, the nose will gradually increase, the prominence of the eye increases, and the degree of excess skin gradually reduced, so the age of surgery is generally appropriate after the age of 10 years. Patients with wide inner canthus of both eyes are especially suitable for this surgery. What preparation is needed before surgery Before surgery, you should ask a professional physician to determine the type and extent of the inner canthus and the specific method of surgery, and clean your face. Women should avoid menstruation. 4, post-surgery care and recovery Although the vision of the eyes is not affected in any way after canthal surgery, too much eye use is not conducive to the reduction of swelling. You need to rest for about a week and follow the doctor’s instructions to visit the hospital on time for local cleaning (using saline) and prohibit forceful rubbing on the eye, and remove the stitches about 7 days after surgery. After surgery, anti-scar medication can be used to promote scar fading, and a spicy diet should be avoided or reduced during the post-operative recovery period. Common surgical methods for medial canthus: (1) Medial canthus skin excision method: This method is suitable for patients with medial canthus with a small range of medial canthus, and involves simply excising the excess skin of the medial canthus, peeling it off slightly, traction of the medial canthus skin toward the back of the nose, and suturing the skin after revealing the medial canthus. The results of this procedure are less than ideal, and it is rarely used now. (2) “Y-V” suture method: This is suitable for patients with mild canthus. The method is to make a horizontal “Y” shaped incision in the medial canthus, the size of which is determined as needed, and the width of the upper and lower canthus should generally be greater than the lid cleft. The canthus is sutured to the nasal side with a horizontal “V” shaped wound. (3) Blair-Brown’s method: For patients with large medial canthus. The method is to make an incision in the medial canthus, peel off two triangular flaps deep to the medial canthal ligament, close the medial canthal ligament to the nasal side with sutures, tract the two flap tips to the nasal side with sutures at the top of the transverse incision, and finally close each skin margin in a “∈” shape. (4) Ping He method: Applicable to patients with medial canthus type redundancy. The method is to make a “>”-shaped incision in the medial canthus, peel the flap, fix a stitch in the medial canthus, and loosen the redundant skin. The skin protruding above and below the canthus is excised and then sutured into a “<" shape. (5) "Z" shaping method: This method is suitable for patients with various kinds of medial canthus. The Z-shaped incision is made in the medial canthus, the subcutaneous tissue around the incision is peeled off, two triangular flaps are made, the two flaps are exchanged, and the skin edges are sutured together. The two flaps are exchanged and the skin edges are sutured together. There are several specific surgical approaches that are often used in clinical practice, and the "Z" shaped surgical approach is generally different depending on the patient's condition. (6) Mustarde's method (four flap method): This is the more commonly used surgical method and is more effective. It is suitable for patients with inverted, medial canthus, combined with widened medial canthus, small lid fissure and ptosis. Four flaps are made in the medial canthus, exchanged and sutured. (7) Speath flap correction: This is indicated for patients with a combination of medial canthus and mild lower lid ectropion. A tongue-shaped flap is made on the medial aspect of the upper eyelid in the medial canthus, peeled off and rotated to the skin defect area of the lower eyelid, and the wound edges are sutured.