I haven't had the surgery as I'm not even Asian but I can tell you a little bit of what it consists of if that's any help. The double eyelid surgery involves surgical creation o a crease in the eyelid which believe it or not is a rather simple procedure that involves either suturing the eyelids (least invasive) or using a small incision along the natural crease to remove soft tissue underneath (fat and muscle) which in return creates the double eyelid since the skin is able to sink back in without any excess soft tissue "puffing" it out. The preferred approach is the full skin incision.
A significant anatomical difference with Asian eyelids is that the orbital septum, or in simple terms the layer that holds back the fat, extends further out, closer to the eyelid edge. When that is taken away the orbital fat is able to sink further, hence giving the desired crease.
“One popular new plastic surgery technique is called lip grafting, or "fat recycling" wherein fat cells are removed from one part of your body that is too large, such as your buttocks, and injected into your lips; people will then be literally kissing ass.”