Double eyelid surgery is one of the most common cosmetic surgical procedures. It may seem simple, but it is not easy to achieve satisfaction for all patients. If you are thinking of having double eyelid surgery, it is important to know the key points of double eyelid surgery, which, to a certain extent, can directly affect the results of the surgery. The surgery can be done according to the shape required by the patient and the shape of the existing blepharoplasty line, and the surgeon can be fully consulted before the surgery is planned. 2. Seize the timing of the repair Blepharoplasty is requested when the heavy lids are too wide, asymmetrical, disappearing, unnatural, the surgical scars are too large or the skin under the heavy lids looks puffy. The key issues in blepharoplasty are the degree of adhesion and preservation of the tissue that has formed and the presence or absence of skin, so it is best to consider whether to have a revision 6 months after the initial surgery if you are less satisfied with the post-operative results. 3. Choosing a Surgical Procedure Blepharoplasty is relatively complex and has a slightly longer recovery time than the initial surgery. The stitches are usually removed 4 to 5 days after surgery and the acute swelling disappears in about a week to 10 days. Most blepharoplasty surgical methods are incisional, but it may be possible to continue with the buried wire method of fixation depending on the specific situation and the wishes of the candidate. 4. Understand the tissue filler method 1) Rely on your own tissue stretching to supplement tissue loss and adhesions. Features: The transplantation of own fascial fat treated with gel medium is used to fill the missing tissues. This method has a high fat survival rate and the restored skin around the eye is rich in normal elasticity and softness. 2) Filling with various foreign materials to compensate for tissue loss and adhesions caused by surgery. Features: prone to rejection reaction, infection, post-operative unevenness with scarring and unnatural shape, etc.