In double eyelid surgery, in addition to increasing the sense of distance between the upper and lower eyelids of the eyes by cutting the double eyelids, you can also increase the width of the eyes from left to right by opening the corners of the eyes. What we usually call opening the eye angle, in fact, mainly refers to opening the inner corner of the eye. In addition to the inner corner of the eye, of course, there is also the outer corner of the eye. The difference between the two concepts, the surgical method, the surgical effect seems to be more or less the same, but in fact it is not! First of all, use a most simple analogy to illustrate a problem, a house, dim light. To make the house brighter, we can open the windows. Open the inner eye angle plastic, equivalent to, by hand, open the window on the wall is good, this window is originally existed, you just need to open. To open the outer corner of the eye, is equivalent to the wall originally did not have a window, you need to cut the wall again to make a window. Opening the inner corner of the eye is actually opening the inner canthus at the inner corner of the eye to reveal the original eye structure. We often refer to the opening of the inner corner of the eye, in fact, refers to the opening of the inner corner of the eye. The outer corner of the eye is affected by the orbital bone, and generally, there is not much room to open it up. At the same time, opening the outer corner of the eye is extremely easy to retract. In other words, it is for patients with real deformities of the outer corner of the eye, not for people with normal outer corner patterns.