Guo Huizhong, Hu Gang, Xu Qianqian, Qin Hongzhi, Li Fang, Kang Le, Qu Hui, Li Xiang, Gao Jinghen
Zhonghua Zheng Xing Wai Ke Za Zhi. 2016 Jan;32(1):29-35.
To investigate the facial aging analysis of 1200 Han adult people in Dalian with iris diameter, so as to provide reference for facial rejuvenation in Han people.
1200 facial digital photographs from the second-generation ID card of China were stratified randomly selected as the research sample, excluding facial deformity, tattooing eyebrow, tattooing lid margin, ptosis, lip grain and eyebrow deformity cases, as well as the cases whose join point of upper eyelid and lower eyelid not exposed at the nasal side. These photos were divided into six cohorts: female aged 18, 38, and 68 years old; and male aged 18, 38, and 68 years old, with 200 cases in each cohort. The individual iris diameter was divided into 20 equal parts in each photograph, with each part marked one unit as individual iris diameter ruler. Ten values were made from a horizontal plane between the medial canthus to ten points at one face ( the line between two medial canthus is used as the horizontal line, circumocular and facial soft tissue were measured with individual iris diameter ruler on the photographs), then the results were analyzed with Adobe Photoshop software.
There are statistically significant differences in eyebrow height (36.42 ± 4.22 unit in 18 years old male group, 40.22 ± 6.90 unit in 38 years old male group, 34.83 ± 9.39 unit in 68 years old male group; 37.59 ± 6.72 unit in 18 years old female group, 41.09 ± 5.15 unit in 38 years old female group, 36.84 ± 9.45 unit in 68 years old female group), palpebral fissure height, physiognomic external canthus height, palpebral fissure width, pupil height and other items (P < 0.05).
(1) The brow position rises to the peak level at middle age (38 years old group), then drops down gradually with aging. (2) The physiognomic external canthus moves towards the nasal side and caudal side with aging. (3) Eyeball moves towards caudal side with aging. (4) The soft tissue around bilateral angle of mouth, nasal tip and submaxilla moves towards caudal side with aging. (5) The measurement of individual iris diameter ruler can apply to analyze the aging changes of facial soft tissue, and is more suitable for the case when facial photographs are taken at different distances.
通过虹膜直径对1200名大连汉族成年人进行面部衰老分析，为汉族人群面部年轻化提供参考。
随机分层抽取1200张来自中国第二代身份证的面部数码照片作为研究样本，排除面部畸形、纹眉、纹睑缘、上睑下垂、唇纹及眉畸形病例，以及上睑与下睑鼻侧交界处未暴露的病例。这些照片分为六个队列：18岁、38岁和68岁的女性；以及18岁、38岁和68岁的男性，每个队列200例。在每张照片中将个体虹膜直径等分为20份，每份标记为一个单位作为个体虹膜直径尺。从内眦之间的水平面到面部的十个点取十个值（以内眦之间的连线为水平线，在照片上用个体虹膜直径尺测量眼周及面部软组织），然后用Adobe Photoshop软件进行分析。
眉高度（18岁男性组为36.42±4.22单位，38岁男性组为40.22±6.90单位，68岁男性组为34.83±9.39单位；18岁女性组为37.59±6.72单位，38岁女性组为41.09±5.15单位，68岁女性组为36.84±9.45单位）、睑裂高度、容貌外眦高度、睑裂宽度、瞳孔高度等项目差异有统计学意义（P<0.05）。
（1）眉位在中年（38岁组）升至最高水平，然后随年龄增长逐渐下降。（2）容貌外眦随年龄增长向鼻侧和尾侧移动。（3）眼球随年龄增长向尾侧移动。（4）双侧口角、鼻尖及颌下周围的软组织随年龄增长向尾侧移动。（5）个体虹膜直径尺测量可用于分析面部软组织的衰老变化，更适用于不同距离拍摄面部照片的情况。
