Congenital entropion is mostly bilateral and is more common in the East than in humans. It has been reported that 50% of the Chinese population has congenital canthus, with a higher probability in children under 10 years of age (about 79.5%). Female patients are more common, and most canthoses disappear with age, although there are lifelong concomitant cases. Variants of medial canthus include lid, lid plate, brow, and inverted. The lid type is the most common, followed by the lid type, brow type, and inverted type. Z-plasty is suitable for all types and degrees of canthus except for the inverted canthus. Asian upper eyelid characteristics include lack of crease, excess fat, lax lid skin, and canthus. For Chinese patients, blepharoplasty is more focused on the natural appearance after surgery. Internal canthus can cause short eyelashes and canthal fold, and canthoplasty can widen the eye fissure and complement the aesthetic results of blepharoplasty. There are many treatment options for canthus: Mustarde, Y-V, V-Y flap, Z-plasty, and V-W-plasty. For the Asian population, some of these procedures are more complex, more extensive and produce scars, making many doctors and patients hesitant to choose a surgical procedure. The medial canthus is a morphological abnormality of the inner canthus skin due to the abnormal distribution of the internal orbicularis oculi muscle. Therefore, changing the direction of the skin and treating the deeper skin tissue is the key to this surgery. The younger population has better skin elasticity and is more suitable for this procedure, while the simple design and operation, good results, and minimal scars meet the needs of surgeons and patients.