Many people will find that after having double eyelids, their eyes still don’t look good, often because they ignore this problem of the eye – the medial canthus What is medial canthus? It is a fold of skin that runs vertically down through the inner canthus. The medial canthus is often hidden by this canthus. The canthus can partially obscure vision, sometimes resulting in a false internal strabismus or, in the case of heavy eyelids, a “half double” due to the canthus, which not only affects the appearance of the eye, but also the normal function of the eye. The standard distance between the eyes is divided into two categories: congenital and acquired. Congenital: Mostly bilateral, with genetic characteristics, severe cases are often associated with ptosis and small lid fissures. Acquired: Acquired medial canthus is most often caused by trauma, burns, and scalds, is mostly unilateral, and is often associated with damage to adjacent tissues, such as damage to the lacrimal duct and damage to the medial canthal ligament. For canthus can be corrected from the following two aspects 1.Double eyelid + canthus correction By removing excess fat from the inner corner of the eyes, the canthus can be eliminated and the spacing between the eyes can be adjusted to make the facial proportion more harmonious. 2.Eye opening + canthus correction For canthus with small lid fissures and wide spacing between the eyes, combined eye opening surgery can make the eyes bigger and more perfect.