Generally speaking, opening the angle is to cut off the outer corner of the eye and then extend the horizontal length of the eye to achieve the effect of opening the angle. The most obvious effect of opening the angle is to make the eyes brighter. Opening the corner of the eye will not only enlarge the eyes, but also change the phenomenon of eyelid skin relaxation. Nowadays, canthus surgery is an essential medical cosmetic surgery. Advantages of opening the corner of the eye: the operation method is relatively simple, and the effect of improving the size of the eye can be easily achieved. People who are dissatisfied with their eyes can improve their present situation by opening their eyes, and achieve the most ideal effect by opening their eyes.