The criteria for perfect, qualified double eyelid surgery are different for each surgeon and patient, and the surgery is hardly perfect, so it is really a matter of opinion. The following standards of perfection are for reference only. After double eyelid surgery, there are no obvious scars and folds on the upper eyelid when the eyes are closed. When the eyes are open, the folds of the upper eyelids are symmetrical, with a natural and smooth arc and appropriate width and depth. The eyelid margins are in a normal position, the eyelashes are appropriately upturned, and the lid bulb is well adhered to the eyelid. The upper eyelid is plump but not bloated, and the eye sockets are clear but not sunken. It is important to harmonize with the eyebrows, eye lobes, face shape and facial features. Therefore I believe that harmonious beauty is the highest state.