Double eyelids and single pairs are very common in our lives. No two leaves are the same, even the natural double eyelids are not exactly the same. Some differences are in the corners of the eyes, some differences are in the eyelids, some differences are in the outer corners of the eyes, and the inner and outer corners of the eyes are more asymmetrical. The asymmetry of double eyelids is mostly reflected on both sides. One side of double eyelids has a single eyelid, one side has multiple folds, and one side is obvious and the other side is not obvious. The asymmetry of epicanthus is mainly manifested in that one side of epicanthus is too large, the other side is too small, and the epicanthus on both sides is not symmetrical enough. A good solution for single and double eyelids is to reshape the shape by embedding or cutting the eyelids. But it should be noted that even if it is born, it is impossible to achieve the same differences on both sides. What's more, the situation of the two eyes is different, and the recovery of the two eyes will not be exactly the same. It is the most rational to treat them differently.