Clinical anatomy and mechanism of eyelid opening and closing for double eyelidplasty

Double eyelidplasty is one of the most common cosmetic operations in Japan. Since eyelids not only have a significant impact on facial appearance but also play a quite important role in facial movement and emotional expression, careful attention should be paid during operation. Complete understanding of the clinical anatomy and mechanism of the eyelid opening/closing are mandatory for good results and patients' satisfaction. In this chapter, several points of clinical anatomy for double eyelidplasty and the parameters that have an effect for determining the width of double eyelid fold are discussed.