The medial canthus is a common ophthalmologic disorder caused by congenital developmental abnormality, in which the patient’s upper eyelid near the inner corner of the eye forms a skin fold that extends toward the lower eyelid, which can affect the patient’s appearance. The inner canthus is commonly seen in yellow people, is caused by congenital developmental abnormality, the patient’s upper eyelid near the inner corner of the eye form skin folds and then extend towards the lower eyelid, which leads to the appearance of abnormalities, it looks like the distance between the eyes become wider, which affects the patient’s appearance, but will not affect the function of the eyes. Treatment is mainly through surgical correction, you can do inner canthus molding surgery, also known as the old saying eye opening surgery, remodeling the structure of the inner canthus, you will be able to make the appearance back to normal. It is recommended that patients with obvious medial canthus should visit a hospital to assess their condition and undergo treatment under the guidance of a doctor.