Patients with medial canthus can be corrected through surgery, which involves a local injection of anesthetic medication, surgical incision of the inner corner of the eye and sutures to fix the inner canthus to create a normal shape of the corner of the eye. Patients with medial canthus can be corrected through surgery, which first requires a local injection of anesthetic medication to numb the pain-sensing nerve fibers, such as an injection of lidocaine injection. Subsequently, the excess skin folds in the inner corner of the eye are cut open, and the localized skin is sutured and fixed in the correct position according to the amount of correction designed before the surgery, and the patient’s appearance can be improved after healing. The inner canthus is a common ophthalmologic disease, which is caused by developmental abnormalities. The inner corner of the upper eyelid of the patient will be extended towards the lower eyelid, thus forming a redundant skin fold, which will make the spacing between the eyes of the patient look too wide, thus affecting the patient’s appearance. It is recommended that patients with obvious inner canthus should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.