Eyes are the first of the five senses and the main visual function. Vision plays an extremely important role in people's understanding of the objective world. Usually 90% of the information obtained from the outside world is done by eyes. It is also an expression organ, a display of people's inner world, which can fully reflect people's inner activities such as joy, anger, hope and joy, so it is called the window of the soul. It can be seen that the eyes play an important role in the five senses. Double eyelid surgery can make the eyes bigger, the eyelashes upturned, reduce the swelling of the upper eyelid, make the upper eyelid thinner and more delicate, and increase the aesthetic feeling. Therefore, the number of people who require double eyelids accounts for the first place in the amount of cosmetic surgery. Double eyelid surgery's methods can be roughly divided into three types: thread embedding, suture and incision. Among them, incision method is suitable for any type of single eyelid, especially for those with loose and bloated upper eyelid skin. double eyelid surgery