Opening the corner of the eye and double eyelids can be done together, and the effect of these two plastic surgery together is more perfect. Double eyelid surgery is to cut the eyelid, properly remove the thick fat layer and muscle, and make the eyelid thinner. Incision of canthus is to cut the lateral mucosa of the eye and lengthen the fissure horizontally. Because it cuts the lateral mucosa of the eye, it won't form a scar, and it won't conflict with double eyelid surgery. These two operations can be parallel.