The difference between opening the corner of the eye and not opening the corner of the eye lies in whether the length of the eye has increased. The width of eyes is mainly whether levator palpebrae superioris is treated or not, and the other is the difference between double eyelids. Opening the corner of the eye increases the length of the eye, and opening the inner corner of the eye is especially suitable for cases with severe epicanthus. At this time, the inner corner of the eye is opened to expose part of the inner corner, or to expose most of it. Of course, you need to discuss with the patient before opening the corner of your eye. It is recommended not to open the inner corner of the eye too wide. It's not very nice to show the whole tear mound. If people like it, it's another matter. The outer corner of the eye is also the same. After passing through the outer corner of the eye, the eyes are getting narrower and narrower, so the biggest difference between opening the angle and not opening the angle is whether the length of the eyes has changed. Be sure to let the doctor take a look at the situation and open another one to see if there is room for it. If the inner canthus is no longer overgrown with weeds, it won't open much more, so it is necessary to find out whether it is suitable for opening.