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首页> 外文期刊>Ophthalmic & physiological optics: the journal of the British College of Ophthalmic Opticians (Optometrists) >Comparison of keratometry measurements using the Pentacam HR, the Orbscan IIz, and the TMS-4 topographer
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Comparison of keratometry measurements using the Pentacam HR, the Orbscan IIz, and the TMS-4 topographer

机译：使用Pentacam HR，Orbscan IIz和TMS-4地形图仪进行角膜测量的比较

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Purpose: To compare and evaluate the agreement between keratometry readings using three devices: the Pentacam HR, the Orbscan IIz, and the TMS-4 topographer. Methods: In this prospective comparative study, 115 eyes from 115 healthy refractive surgery candidates were sequentially examined using three devices. Fourier analysis was used to evaluate corneal astigmatism in these subjects. The outcome measures comprised steep and flat keratometry readings, corneal astigmatism, the mean keratometry reading, and the J0 and J45 components. Repeated-measures analysis of variance (RM-anova) and Bland-Altman plots with 95% limits of agreement were used to evaluate the difference between measurements. Results: The mean keratometry readings were 43.89 ± 1.51, 43.52 ± 1.48, and 43.79 ± 1.50 D using the TMS-4 topographer, the Orbscan IIz, and the Pentacam HR, respectively (p < 0.001; RM-anova). The mean keratometric astigmatism was 1.27 ± 0.87, 1.20 ± 0.86, and 1.21 ± 0.82 D using the TMS-4 topographer, the Orbscan IIz, and the Pentacam HR, respectively (p = 0.007; RM-anova). The J0 measurements were higher using the TMS-4 topographer compared with the Orbscan IIz (p = 0.021; Bonferroni test). The mean, steep, and flat keratometry data were in better agreement using the TMS-4 topographer and the Pentacam HR. In general, the Orbscan IIz device measured lower values than either the TMS-4 topographer or the Pentacam HR. However, the corneal astigmatism measurements and the J0 component showed the best agreement using the TMS-4 topographer and the Orbscan IIz. Conclusions: The TMS-4 topographer and the Pentacam HR produced similar readings and can be used interchangeably to measure simulated keratometry values in young, healthy eyes. To measure corneal astigmatism, the TMS-4 topographer and the Orbscan IIz produced values that were similar and could be used interchangeably.
机译：目的：使用三种设备比较和评估角膜测量法读数之间的一致性：Pentacam HR，Orbscan IIz和TMS-4地形图仪。方法：在这项前瞻性比较研究中，使用三种设备依次检查了115名健康屈光手术候选人的115只眼睛。傅里叶分析用于评估这些受试者的角膜散光。结果测量包括陡峭和平坦的角膜曲率读数，角膜散光，平均角膜曲率读数以及J0和J45分量。重复测量方差分析（RM-anova）和Bland-Altman图具有95％的一致性极限，用于评估测量之间的差异。结果：使用TMS-4地形图仪，Orbscan IIz和Pentacam HR，平均角膜曲率读数分别为43.89±1.51、43.52±1.48和43.79±1.50 D（p <0.001; RM-anova）。使用TMS-4地形图仪，Orbscan IIz和Pentacam HR时，平均角膜散光分别为1.27±0.87、1.20±0.86和1.21±0.82 D（p = 0.007; RM-anova）。与Orbscan IIz相比，使用TMS-4地形图仪测得的J0值更高（p = 0.021; Bonferroni测试）。使用TMS-4地形图仪和Pentacam HR可以更好地吻合平均，陡峭和平坦的角膜测量数据。通常，Orbscan IIz设备的测量值低于TMS-4地形图仪或Pentacam HR。但是，使用TMS-4地形图仪和Orbscan IIz时，角膜散光测量和J0分量显示出最好的一致性。结论：TMS-4地形图仪和Pentacam HR产生相似的读数，可以互换使用，以测量年轻健康的眼睛的模拟角膜曲率测量值。为了测量角膜散光，TMS-4地形图仪和Orbscan IIz产生的值相似，可以互换使用。

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