背景:许多消费者使用化妆品眼用产品来抵消与年龄相关的外观变化。仅在正面视图或45度轮廓中报道了亚洲女性眼睑形状的测量。这项研究的目的是从正面和轮廓方面描述日本和中国女性上眼睑的形态特征,并检查随年龄的形态变化。
方法:获得了772名日本妇女和346名中国妇女(15-79岁)在额叶和90度轮廓方面的标准化数码照片。11个上眼睑参数(例如,宽度,长度,深度,光圈,和曲率)使用图像分析进行测量,以确定与年龄相关的变化并按种族进行比较。
结果:眼睑宽度,眉毛和眼睑之间的区域,40岁以下的两个种族和眼睑曲率相当,但中国受试者的衰老效应更为明显。眼睑高度,深度,40岁以下两个种族的上眼睑孔径角也相当,但日本受试者的衰老效应更为明显。上眼睑倾斜角度,眼睛方向,两个种族的上眼睑突出角度均随年龄变化。闭眼时,眼睑长度或眉毛和眼睛之间的区域没有明显的年龄相关变化。
结论:日本和中国女性的上眼睑形态随年龄变化,从40岁左右开始。种族差异在较年轻的年龄组中受到限制,但随着年龄的增长而变得更加突出。研究结果表明,衰老比其他特征更早地影响某些上眼睑特征。
BACKGROUND: Many consumers use cosmetic eye products to counteract age-related changes in appearance. Measurements of eyelid shape in Asian women have been reported in the frontal view or 45-degree profile only. The aim of this study was to describe morphological characteristics of the upper eyelid in Japanese and Chinese females from the frontal and profile aspects and examine morphological changes with age.
METHODS: Standardized digital photographs of 772 Japanese and 346 Chinese women (15-79 years of age) were acquired in frontal and 90-degree profile aspects. Eleven upper eyelid parameters (e.g., width, length, depth, aperture, and curvature) were measured using image analysis to determine age-related changes and compare by ethnicity.
RESULTS: Eyelid width, area between eyebrow and eyelid, and eyelid curvature were comparable for both ethnicities under age 40, but the aging effect was more pronounced in Chinese subjects. Eyelid height, depth, and upper eyelid aperture angle were also comparable for both ethnicities under age 40, but the aging effect was more evident in Japanese subjects. Upper eyelid incline angle, eye orientation, and upper eyelid protrusion angle changed comparably with age for both ethnicities. No prominent age-related changes were evident for eyelid length or area between eyebrow and eye with the eye closed.
CONCLUSIONS: Upper eyelid morphology changes with age in Japanese and Chinese females, starting around 40 years of age. Ethnic differences are limited in younger age groups but become more prominent with age. The findings suggest that aging affects some upper eyelid features earlier than others.