The possibility of double eyelid surgery for sagging eyelids depends on the degree of eyelid laxity. Depending on the degree of ptosis, it can be classified as mild, moderate or severe. People with mild ptosis, where the eyelids are loose and can even partially obscure the pupil, can be improved with double eyelid surgery, for which a full double eyelid cut is indicated. In the case of moderate to severe ptosis, where the eyelid laxity is severe and is due to a severe loss of function of the levator muscle and smooth muscle, the pupil may be completely obscured, and a simple double eyelid surgery may not achieve corrective results, but rather affect the results of the double eyelid surgery. However, it can be corrected with a frontalis flap suspension and a shortening of the levator muscle. This is because double eyelid surgery uses the levator muscle to form a fold in the open eye to achieve a heavy eyelid effect, and the levator muscle plays a very important role in forming the heavy eyelid; in people with ptosis, the function of the levator muscle is partially or completely lost, and if the levator muscle is not corrected, the double eyelids obtained after surgery will not be symmetrical and have a very high chance of disappearing. There are many ways to correct ptosis, such as epicanthoplasty, which is a surgical procedure that involves cutting the levator muscle to shorten the length of the levator muscle to achieve a double eyelid effect. There are also frontalis fascia suspensions and frontalis flap methods that use contraction of the frontalis muscle to strengthen the levator muscle, thereby correcting ptosis and improving eyelid laxity. Thus, candidates with ptosis, or lax eyelids, may wish to undergo double eyelid surgery in conjunction with upper and lower lid ptosis correction for better postoperative results.