Not everyone is suitable for an eye opening, and the people who are suitable for an eye opening: 1. Short lid fissure: normal people have a lid fissure of about 28 mm. 2, there is an inner canthus, which is the excess skin in the inner corner area of the upper eyelid that obscures the inner corner of the eye. 3. Widening of the distance between the two eyes. The normal distance between the two eyes is approximately the length of one eye. If there are no above problems there is no need to open the corner of the eye. There are many methods to open the corner of the eye: transverse cut method, Z-formation, V-Y advancement, L-shaped superfluous skin removal method, MUSTARDE method, M flap method. There are also many modified methods. These methods are chosen according to each person’s specific situation and the surgeon’s personal preference of aesthetic view.