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 a candidate can have a double eyelid 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, changing the shape of the upper eyelids in people with internal doublets, thus creating new double eyelids. Therefore, people with double eyelids are suitable for double eyelid surgery, and they do not have to worry about the appearance of “triple eyelids” after the surgery. However, due to the low position of the inner double fold, the inner double can cut double eyelid will not be as obvious as the normal double eyelid. In addition, the first time to do double eyelid surgery is very important, if the surgery fails or is not ideal will bring a lot of difficulties to the later repair. It is advisable to go to a professionally qualified medical institution for double eyelid surgery so as to guarantee the safety and effect of the surgery.