Oh Kwang-Keun, Moon Byeong-Yeon, Cho Hyun Gug, Kim Sang-Yeob, Yu Dong-Sik
Department of Optometry, Kangwon National University, Samcheok, South Korea.
J Int Med Res. 2021 Mar;49(3):300060521997329. doi: 10.1177/0300060521997329.
To compare the ocular counter-roll (OCR) measured using iris images during binocular fixation and head tilt with OCR measured via fundus photography.
Fifty-three healthy college students participated in this study. The mean OCR was measured by collection of iris images and fundus images under seven head tilt conditions (0 degrees; 10, 20, and 30 degrees right; and 10, 20, and 30 degrees left). Three iris images (crossed pupil center, pupil center, and pupil periphery) were taken using a slit-lamp biomicroscope with an ophthalmic camera and a half-silvered mirror; fundus images were collected via fundus photography. The mean OCR values were compared between images taken with each method.
No iris images or head tilt conditions revealed any significant differences in mean OCR comparison with fundus images. The mean difference in OCR was smallest, and the correlation was greatest, between the crossed pupil center and fundus images.
A half-silvered mirror and iris images can replace fundus photography for the measurement of OCR.
比较双眼注视和头部倾斜时利用虹膜图像测量的眼反向转动（OCR）与通过眼底摄影测量的OCR。
53名健康大学生参与了本研究。在七种头部倾斜条件下（0度；向右10度、20度和30度；向左10度、20度和30度），通过采集虹膜图像和眼底图像测量平均OCR。使用带有眼科相机和半镀银镜的裂隙灯生物显微镜拍摄三张虹膜图像（交叉瞳孔中心、瞳孔中心和瞳孔周边）；通过眼底摄影采集眼底图像。比较每种方法拍摄的图像之间的平均OCR值。
与眼底图像相比，在平均OCR比较中，没有虹膜图像或头部倾斜条件显示出任何显著差异。交叉瞳孔中心与眼底图像之间的OCR平均差异最小，相关性最大。
半镀银镜和虹膜图像可替代眼底摄影用于测量OCR。
