한국인에서 연령에 따른 아래속눈썹의 수평각도 변화
Changes in the Horizontal Angular Direction of Lower Eyelashes with Age in Korean Patients
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목적: 한국인의 아래속눈썹의 수평각도를 측정하고 연령에 따른 변화 양상을 분석해 보고자 하였다. 대상과 방법: 정면주시 사진을 촬영한 122명을 연령에 따라 소아, 성인, 노령 세 개의 군으로 나누어 분석하였다. 아래속눈썹은 내측, 중간, 가측으로 나누고, 각 부분은 다시 세 부분으로 세분화한 후 평균값을 분석에 이용하였다. 중앙에 위치한 아래속눈썹과 안쪽눈구석과 가쪽눈구석을 연결한 기준선이 이루는 각도를 외측을 0°, 내측을 180°로 기준으로 하여 측정한 후, 연령과의 상관성을 분석하였다. 결과: 내측 아래속눈썹의 각도는 소아군 142.4 ± 10.8°, 성인군 137.1 ± 13.8°, 노령군 120.4 ± 13.0°였고, 연령에 따라 음의 상관관계를 보였다(r=-0.56, p＜0.01). 중간 아래속눈썹의 각도는 소아군 62.8 ± 18.5°, 성인군 71.8 ± 14.5°, 노령군 86.0 ± 10.5°였고, 연령에 따라 양의 상관관계를 보였다(r=0.42, p＜0.01). 가측 아래속눈썹의 각도는 소아군 23.3 ± 13.7°, 성인군 25.3 ± 9.3°, 노령군29.5 ± 8.1°였고, 연령에 따라 양의 상관관계를 보였다(r=0.16, p=0.04). 결론: 한국인에서 연령이 증가할수록 내측 아래속눈썹은 각도가 감소하였고, 중간과 가측 아래속눈썹은 각도가 증가하는 양상을 보였다. 이는 소아군과 성인군의 얼굴 골격근의 성장에 따른 눈꺼풀 피부의 신장과, 노령에서 눈꺼풀의 수평이완과 눈둘레근의 변화에 의한 것으로 생각된다.
Abstract
Purpose: To characterize the horizontal angular direction of lower eyelashes in different age groups of Korean patients. Methods: Digital photographs of 122 patients were obtained and the patients were divided into three groups involving children 6– 19 years of age, adults 20–64 years of age, and older adults 65–85 years of age. Lower eyelashes were divided into medial, central, and lateral portions. Each portion was subdivided into three parts and the average value of the three parts was obtained for each portion. Horizontal angular directions tangential to the baseline between the medial and lateral canthus were measured and the data were compared between different portions and groups. Results: The mean horizontal angular directions of the lower eyelash in the medial portions were 142.4 ± 10.8° in children, 137.1 ± 13.8° in adults, and 120.4 ± 13.0° in older adults. There was a negative correlation with age (r = -0.56, p < 0.01). In central portions, the values were 62.8 ± 18.5°, 71.8 ± 14.5°, and 86.0 ± 10.5°, respectively; and in lateral portions they were 23.3 ± 13.7°, 25.3 ± 9.3°, and 29.5 ± 8.1°. There were positive correlations with aging in the central and lateral portions (r = 0.42, p < 0.01; r = 0. 16, p = 0.04, respectively). Conclusions: The mean horizontal angular direction of eye lashes decreases with age in the medial portion of the lower eyelid but increases in the central and lateral portions in Korean patients. This may be related to factors such as stretching of the eyelid and involutional horizontal eyelid laxity and orbicularis muscle changes.
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