Group of Optics and Visual Perception (L.B., A.M.-M., D.P.P.), Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain ; and Department of Ophthalmology (D.P.P.), Vithas Medimar International Hospital, Alicante, Spain .
Eye Contact Lens. 2021 Oct 1;47(10):546-551. doi: 10.1097/ICL.0000000000000785.
To compare the sagittal height (SH) measurements and best fit sphere (BFS) scleral curvature obtained with two different diagnostic technologies.
Prospective, nonrandomized, and comparative study analyzing 23 healthy eyes of 23 patients (age, 14-52 years) was conducted. A complete eye examination was performed including a corneoscleral topographic analysis with the Scheimpflug camera-based system Pentacam (Oculus GmbH, Wetzlar, Germany) and afterward with the Fourier domain profilometer Eye Surface Profiler (ESP) (Eaglet-Eye, Houten, the Netherlands). Differences between devices in temporal SH (TSH), nasal SH (NSH), and mean SH (MSH) measurements at 13- and 15-mm chord length and in scleral BFS were analyzed.
Statistically significant differences were found in TSH, NSH, and MSH obtained with Pentacam and ESP (P≤0.017), with a range of agreement from 0.21 to 1.28 mm, and a clear trend of the Pentacam system to provide higher SH measurements. Significant differences were found between Pentacam scleral BFS and ESP outer BFS (P<0.001) (range agreement, 3.57 mm). Significant correlations were found between spherical equivalent and differences between devices in 15-mm TSH (r=0.485; P=0.048), as well as between the difference between devices for some SH measurements and the magnitude of such SH values (r≥0.504; P≤0.014).
Sagittal height and scleral BFS measurements obtained with the two devices are not interchangeable, with an increased difference in SH measures between devices in eyes with less myopic refractive error and increased SH values.
比较两种不同诊断技术获得的矢状高度（SH）测量值和最佳拟合球体（BFS）巩膜曲率。
进行了一项前瞻性、非随机和对照研究，分析了 23 名患者（年龄 14-52 岁）的 23 只健康眼。进行了全面的眼部检查，包括使用基于 Scheimpflug 相机的系统 Pentacam（德国 Oculus GmbH，Wetzlar）和随后的傅里叶域轮廓仪 Eye Surface Profiler（ESP）（荷兰 Houten 的 Eaglet-Eye）进行角膜巩膜 topography 分析。分析了设备之间在 13-15mm 弦长的颞侧 SH（TSH）、鼻侧 SH（NSH）和平均 SH（MSH）测量值以及巩膜 BFS 方面的差异。
使用 Pentacam 和 ESP 获得的 TSH、NSH 和 MSH 存在统计学差异（P≤0.017），一致性范围为 0.21-1.28mm，Pentacam 系统有提供更高 SH 测量值的趋势。Pentacam 巩膜 BFS 与 ESP 外 BFS 之间存在显著差异（P<0.001）（一致性范围，3.57mm）。在 15mm TSH 中，球镜等效值与设备之间的差异之间存在显著相关性（r=0.485；P=0.048），以及设备之间的一些 SH 测量值的差异与这些 SH 值的大小之间存在显著相关性（r≥0.504；P≤0.014）。
两种设备获得的 SH 测量值和巩膜 BFS 测量值不可互换，在近视屈光误差较小和 SH 值较大的眼中，设备之间的 SH 测量值差异较大。
