The incidence of canthal redundancy in Chinese people is about 50%. The webbed canthal redundancy obscures the normal shape of the inner corner of the eye, and in severe cases, it can even cause a false widening of the inner canthal spacing, giving people a sense of short eye fissure and facial stupidity. The presence of canthal redundancy can also be an important factor affecting the post-operative effect of double eyelid surgery. The presence of canthal redundancy can cause the formation of the double eyelid fold line in the inner corner of the eye to be obscured or even disappear completely, thus affecting the final effect of double eyelid surgery. Therefore, in double eyelid surgery, many people need to have their inner corners widened at the same time, but in fact, inner corner widening is not widely used for four main reasons: single-lidded people do not pay enough attention to the impact of the inner canthus on their own eye shape; the patient has concerns about the effect of the inner canthus after correction; the inner canthus correction has to make incisions in the skin of the inner canthus area, which will inevitably leave incision marks; the inner canthus correction surgery design, operation The design and operation of medial canthus correction surgery is delicate and requires a high level of attention from the surgeon, and improper treatment may not achieve the expected results. The traditional view is that canthus is caused by longitudinal skin tension in the medial canthus, and many methods are used to correct canthus by adjusting the distribution of skin in the medial canthus and eliminating longitudinal skin tension in the medial canthus. This approach inevitably leaves more visible incision marks in the medial canthus while eliminating the medial canthus. In order to improve the results of blepharoplasty and to avoid the obvious marks that traditional canthoplasty may leave in the medial canthus, a lid margin incision is used to correct the medial canthus at the same time as the blepharoplasty. The incision is designed to remove the orbicularis oculi muscle in front of the upper eyelid plate in the medial canthus through the lid margin incision, and then sutured to correct the medial canthus, which is a true scarless medial canthoplasty since the incision is no longer made at the obvious location of the medial canthus skin, avoiding leaving an incision scar at the obvious location of the medial canthus. The incision is concealed and the post-operative marks are not visible, so it can be done in conjunction with a variety of blepharoplasties.