Double eyelids are formed because there is fibrous tissue between the skin and the lid plate, and the movement of the lid plate will have a lifting effect on the skin of the upper lid to form a fold. However, in the case of inner eyelids, the fibrous tissues are often low on the skin surface and the eyelids are usually narrow and covered by the skin above. Such candidates can have their eyelids cut to surgically remove the pull of the fibrous tissue on the skin below and re-form the adhesions. When the eyes are opened, new folds are created where the new adhesions were surgically formed, resulting in new double eyelids, thus changing the shape of the upper eyelids in patients with internal pairs. For double eyelids for inner pairs, an external cut is usually used to form new double eyelids. At the same time, because most people with inner double eyelids have bloated eyelids and more orbital septal fat, part of the orbital septal fat is removed during the surgery to make the formed double eyelids thinner and to be able to achieve better results aesthetically. In addition, double eyelid surgery instruments, operations, sutures are more delicate, post-operative swelling, pain is lighter, the post-operative effect is more natural, beautiful. Therefore, the surgical effect of double eyelid surgery is relatively good.