Ewen Andrew, Lee Kristine E, Klein Barbara E K, Klein Ronald
Department of Ophthalmology and Visual Sciences, University of Wisconsin Medical School, Madison, 53726, USA.
Am J Ophthalmol. 2006 Jun;141(6):1126-1128. doi: 10.1016/j.ajo.2005.12.041.
To compare gradings of optic disk and cup diameters from stereoscopic film and nonstereoscopic digital images.
Comparison of techniques.
setting: CLINIC-BASED.
Right eyes of 62 adults. observation procedures: Images of the disk were taken through pharmacologically dilated pupils with a 45-degree digital camera (6.3 megapixels) and with a stereoscopic 30-degree film camera. Measurements were taken for vertical diameters of optic disks and cups.
Agreement of disk and cup measurements and cup to disk ratios.
Optic disks and cups were slightly smaller when graded from the stereoscopic film images. Cup-to-disk ratios were similar. Correlations between film and digital images measurements were high.
Measurements taken from nonstereoscopic digital images through a dilated pupil were similar to those taken from stereoscopic film images. Lack of stereoscopic effect may lead to small differences in measuring the optic disk and cup diameters. Nonstereoscopic digital imaging may be useful in epidemiologic studies when measures of optic cups and disks are needed.
比较立体胶片和非立体数字图像上视盘及杯盘直径的分级情况。
技术比较。
设置：基于临床。
62名成年人的右眼。观察程序：使用45度数码摄像机（630万像素）通过药物散瞳后的瞳孔拍摄视盘图像，以及使用立体30度胶片相机拍摄。对视盘和视杯的垂直直径进行测量。
视盘和视杯测量结果的一致性以及杯盘比。
从立体胶片图像上分级时，视盘和视杯略小。杯盘比相似。胶片图像和数字图像测量之间的相关性较高。
通过散瞳后的瞳孔从非立体数字图像上进行的测量与从立体胶片图像上进行的测量相似。缺乏立体效果可能会导致在测量视盘和视杯直径时出现微小差异。当需要对视杯和视盘进行测量时，非立体数字成像在流行病学研究中可能有用。
