IOBA-Eye Institute, Department of Theoretical Physics, Atomic Physics and Optics, School of Optometry, University of Valladolid, Valladolid, Spain.
J Cataract Refract Surg. 2013 Apr;39(4):585-9. doi: 10.1016/j.jcrs.2012.11.021. Epub 2013 Feb 12.
To evaluate the differences between Orbscan scanning-slit topography and IOLMaster partial coherence interferometry (PCI) white-to-white (WTW) measurements in moderately and highly myopic eyes.
IOBA-Eye Institute, University of Valladolid, Spain.
Comparative case series.
Myopic eyes were divided according to the degree of myopia as follows: Group 1 (<6.00 diopters [D]), Group 2 (between 6.00 D and 12.00 D), and Group 3 (>12.00 D). The WTW distance was measured with the scanning-slit topography and PCI devices.
The study enrolled 328 eyes (64 subjects). The mean WTW in all eyes was 0.50 mm ± 0.26 (SD), lower with scanning-slit topography (11.69 ± 0.37 mm) than with PCI (12.19 ± 0.40 mm) (P<.01, paired t test). A low mean WTW was found in Group 2 (11.65 ± 0.34 and 12.15 ± 0.36 mm, scanning-slit topography and PCI, respectively) and Group 3 (11.51 ± 0.36 and 12.05 ± 0.46 mm, respectively) compared with Group 1 (11.79 ± 0.38 and 12.26 ± 0.40 mm, respectively) (P<.03, analysis of variance with Games-Howell correction). There was a low statistically significant relationship between WTW and spherical equivalent (SE) with both devices.
Eyes with moderate and high degrees of myopia had lower WTW diameters than eyes with low spherical equivalent myopia measured with both devices. Scanning-slit topography provided less WTW distance than PCI in myopic eyes; thus, the devices are not clinically interchangeable.
评估 Orbscan 扫描裂隙地形图和 IOLMaster 部分相干干涉（PCI）白到白（WTW）测量在中度和高度近视眼中的差异。
西班牙巴利亚多利德大学 IOBA-Eye 研究所。
对比病例系列。
根据近视程度将近视眼分为以下三组：第 1 组（<6.00 屈光度 [D]），第 2 组（6.00 D 至 12.00 D 之间），第 3 组（>12.00 D）。使用扫描裂隙地形图和 PCI 设备测量 WTW 距离。
该研究共纳入 328 只眼（64 例）。所有眼的平均 WTW 为 0.50 毫米±0.26（SD），扫描裂隙地形图测量值（11.69 ± 0.37 毫米）低于 PCI（12.19 ± 0.40 毫米）（P<.01，配对 t 检验）。第 2 组（11.65 ± 0.34 和 12.15 ± 0.36 毫米，分别为扫描裂隙地形图和 PCI）和第 3 组（11.51 ± 0.36 和 12.05 ± 0.46 毫米，分别为扫描裂隙地形图和 PCI）的平均 WTW 均较低与第 1 组（11.79 ± 0.38 和 12.26 ± 0.40 毫米，分别为扫描裂隙地形图和 PCI）（P<.03，方差分析与 Games-Howell 校正）。两种设备测量时，WTW 与等效球镜（SE）之间的相关性均较低。
与低等效球镜近视眼相比，中高度近视眼的 WTW 直径较小，两种设备测量结果均如此。在近视眼中，扫描裂隙地形图提供的 WTW 距离比 PCI 少；因此，两种设备在临床上不能互换使用。
