*Department of Dermatology, Saint Louis University, St. Louis, Missouri; †Division of Dermatology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California; ‡Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, British Columbia; §Scientific Communications and Information, Parsippany, New Jersey; ‖Allergan, Inc., Irvine, California.
Dermatol Surg. 2014 Nov;40(11):1208-13. doi: 10.1097/DSS.0000000000000170.
Observations that eyelashes become thinner, shorter, and lighter, as women age has not been previously quantified.
This study was conducted to investigate associations between eyelash characteristics and age.
The upper natural eyelashes of 179 subjects were photographed and analyzed (digital image analysis); length, thickness, and darkness (intensity: 0 = white and 255 = black) were calculated. Linear regression, including race as a potentially confounding factor, was used to assess the association between age and mean eyelash characteristics.
Subjects' mean age was 40.3 (±10.3) years; 46.1% were white, 36.5% Asian, 9.0% Hispanic, 5.1% East Indian, and 3.4% black. Mean eyelash length ranged from 6.39 (±1.02) to 7.98 (±1.15) mm (subjects aged 50-65 years and 22-29 years, respectively). Mean thickness ranged from 1.17 (±0.42) to 1.62 (±0.56) mm (subjects aged 50-65 years and 20-29 years, respectively). Mean intensity ranged from 118.2 (±19.8) to 129.4 (±17.3) (subjects aged 30-39 years and 50-65 years, respectively). Adjusted for race, eyelash length, thickness, and darkness decreased significantly with increasing age (p < .000, p = .0090, and p < .05, respectively).
Advancing age among an ethnically diverse population of healthy women is associated with significant decreases in eyelash length, thickness, and darkness.
人们观察到，随着女性年龄的增长，睫毛会变得更细、更短、更浅，但此前尚未对这种现象进行量化。
本研究旨在调查睫毛特征与年龄之间的关系。
对 179 名受试者的上自然睫毛进行拍摄和分析（数字图像分析）；计算长度、厚度和颜色（强度：0 为白色，255 为黑色）。采用线性回归，包括种族作为潜在混杂因素，评估年龄与平均睫毛特征之间的关系。
受试者的平均年龄为 40.3（±10.3）岁；46.1%为白人，36.5%为亚洲人，9.0%为西班牙裔，5.1%为东印度人，3.4%为黑人。平均睫毛长度范围为 6.39（±1.02）至 7.98（±1.15）mm（分别为 50-65 岁和 22-29 岁的受试者）。平均厚度范围为 1.17（±0.42）至 1.62（±0.56）mm（分别为 50-65 岁和 20-29 岁的受试者）。平均强度范围为 118.2（±19.8）至 129.4（±17.3）（分别为 30-39 岁和 50-65 岁的受试者）。调整种族因素后，睫毛长度、厚度和颜色随着年龄的增长而显著下降（p <.000、p =.0090 和 p <.05，分别）。
在一个种族多样化的健康女性人群中，年龄的增长与睫毛长度、厚度和颜色的显著下降有关。
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