If the double eyelid surgery is too large or too deep, it is easy to cause the levator palpebrae superioris to break, which can not play an effective role, resulting in inability to open eyes, ptosis to the pupil level, resulting in "postoperative ptosis." Then there is the "frightened eye", which describes double eyelid surgery's failure from the perspective of eye appearance. When people are frightened or surprised, their eyebrows will be raised, which will make their double eyelids bigger. If the double eyelids are too large after operation, the eyes will always look "staring", then they will become "frightened eyes".