LAUSR

BACKGROUND The morphological classification of the upper eyelid in Asian people is complex and diverse and usually not consistent with what we know well. AIMS To improve the classification of upper eyelid morphology and investigate the preferred double eyelid shape by Asian people. METHODS An investigation of 640 patients' preferences for double eyelid shape was conducted, and the pre- and post-operative effects were assessed. The shapes of the natural eyelids of 247 people (485 eyes) who provided real photographs of the eyelids were counted. The chi-square test was used to analyze the differences. RESULTS There were 10 eyelid shapes: single eyelid, parallel-shaped double eyelid, fan-shaped double eyelid, parallel fan-shaped double eyelid, opened fan-shaped double eyelid, crescent-shaped double eyelid, hidden-shaped double eyelid, horizontal-shaped double eyelid, triangle-shaped double eyelid, and multiple-fold eyelid. The difference in the shape of the natural eyelid between males and females was statistically significant (p < 0.05). The most popular eyelid shapes were single eyelid (24.9%), open fan-shaped double eyelid (21.0%), fan-shaped double eyelid (16.3%), and hidden-shaped double eyelid (12.6%). Men and women preferred a parallel fan-shaped double eyelid (18.0%), a parallel-shaped double eyelids (17.0%), and an open fan-shaped double eyelids (18.1%). CONCLUSIONS The most popular upper eyelid shapes were single eyelid, open fan-shaped double eyelid, and fan-shaped double eyelid. The parallel fan-shaped, parallel-shaped, and open fan-shaped double eyelid were favored by men and women.