BACKGROUND: Observations that eyelashes become thinner, shorter, and lighter, as @entity1 age has not been previously quantified. OBJECTIVE: This study was conducted to investigate associations between eyelash characteristics and age. MATERIALS AND METHODS: 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. RESULTS: 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 @entity3656 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, @entity3656 , thickness, and darkness decreased significantly with increasing age (p < .000, p = .0090, and p < .05, respectively). CONCLUSION: Advancing age among an ethnically diverse population of healthy @entity1 is associated with significant @entity393 , thickness, and darkness.

Epidemiologic analysis of change in eyelash characteristics with increasing age in a population of healthy XXXX .

@entity1 :: ('9606', 'Species') :: ['women'] @entity3656 :: ('MESH:D007870', 'Disease') :: ['eyelash length'] @entity393 :: ('MESH:D034381', 'Disease') :: ['decreases in eyelash length']
@entity1 :: (9606,Species) :: ['women']
