Golbert Marcelo Blochtein, Garcia Denny Marcos, Akaishi Patrícia Mitiki Santello, Cruz Antonio Augusto Velasco E
Department of Ophthalmology, School of Medicine of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
Craniofacial Research Support Center, Universidade de São Paulo, São Paulo, SP, Brazil.
Arq Bras Oftalmol. 2020 Jan-Feb;83(1):28-32. doi: 10.5935/0004-2749.20200002.
The purpose of the present work is to measure the interocular upper lid contour symmetry using a new method of lid contour quantification.
The Bézier curve tool of the Image J software was used to extract the right and left upper eyelid contours of 75 normal subjects. Inter-observer variability of 29 right lid contours obtained by two independent observers was estimated using the coefficient of overlap of two curves and an analysis of the differences of the contour peak location. A two-way analysis of variance was used to test the mean value of the coefficient of overlap of the right and left contours in males and females and lid segments. The same analysis was performed to compare the location of the contour peak of the right and left contours.
The coefficient of contour overlap obtained by independent observers ranged from 93.5% to 98.8%, with a mean of 96.1% ± 1.6 SD. There was a mean difference of 0.02 mm in the location of the contour peak. Right and left contour symmetry did not differ between females and males and was within the range of the method variability for contour overlap and location of the contour peak.
The upper eyelid contour is highly symmetrical. Bézier lines allow a quick and fast quantification of the lid contour, with a mean inter-observer variability of 3.9%.
本研究旨在使用一种新的眼睑轮廓量化方法来测量双眼上睑轮廓的对称性。
使用Image J软件的贝塞尔曲线工具提取75名正常受试者的左右上眼睑轮廓。通过两条曲线的重叠系数和轮廓峰值位置差异分析，评估了两名独立观察者获得的29个右眼轮廓的观察者间变异性。采用双向方差分析来检验男性和女性以及眼睑节段中左右轮廓重叠系数的平均值。进行相同分析以比较左右轮廓的轮廓峰值位置。
独立观察者获得的轮廓重叠系数范围为93.5%至98.8%，平均值为96.1%±1.6标准差。轮廓峰值位置的平均差异为0.02毫米。女性和男性之间的左右轮廓对称性没有差异，并且在轮廓重叠和轮廓峰值位置的方法变异性范围内。
上眼睑轮廓高度对称。贝塞尔线允许快速且快速地量化眼睑轮廓，观察者间平均变异性为3.9%。
