There are two types of eyelid surgery, the threaded method and the cut method, each with its own advantages.
Double eyelid surgery: Double eyelid surgery is suitable for single eyelids with thin eyelid skin and thin orbicularis oris muscle, single eyelids with no inner canthus and no sagging eyelid skin. The skin needs to be cut, and the trauma is slightly greater. The advantage is that the effect is long-lasting, and can be called permanent double eyelids.
Double eyelid surgery: the surgery is suitable for single eyelid with thick or fatty eyelid, two eyes with inconsistent size or droopy eyelid, the effect is reliable and long-lasting, suitable for single eyelid in various cases, directly bury the suture (or polymer suture) between the skin and the eyelid plate, so that the skin of the upper eyelid and the eyelid plate will adhere to each other to form the heavy eyelid.
You should choose according to your own situation, listen to the professional doctor, do not make a blind decision on your own, so as not to affect your health.