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首页> 外文期刊>Journal of refractive surgery >Comparison of corneal tomography measurements using Galilei, Orbscan II, and Placido disk-based topographer systems.
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Comparison of corneal tomography measurements using Galilei, Orbscan II, and Placido disk-based topographer systems.

机译：使用Galilei，Orbscan II和基于Placido磁盘的地形图仪系统进行角膜层析成像测量的比较。

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PURPOSE: To evaluate agreement in keratometry readings and anterior and posterior elevation map measurements among the Galilei V4.01 (Ziemer), Orbscan IIz (Bausch & Lomb), and Corneal Map topographer (Costruzione Strumenti Oftalmici) systems. METHODS: This prospective comparative study comprised 184 eyes of 92 consecutive refractive surgery candidates who were simultaneously examined with the Galilei (dual Scheimpflug), Orbscan II (scanning-slit), and Corneal Map topographer (Placido disk-based) systems. Keratometry readings and anterior and posterior elevation map measurements were compared using analysis of variance and paired t test, respectively. RESULTS: Mean keratometry reading was 44.30 +/- 1.49 diopters (D), 44.11 +/- 1.47 D, and 44.60 +/- 1.56 D with the Galilei, Orbscan, and Corneal Map topographer, respectively. Despite a significant difference in mean keratometry (P<.001), the correlation among these three systems was strong. The maximum mean difference between two sets in simulated keratometry and astigmatism was <0.50 D. In the evaluation of anterior best-fit-sphere (BFS) and posterior BFS, the correlation between Galilei and Orbscan II was found to be 0.960 and 0.947, respectively. Maximum anterior central elevation measured by Orbscan II and Galilei was 9.2 +/- 5.1 mum and 3.2 +/- 1.8 mum, respectively. Maximum posterior central elevation by Orbscan II and Galilei was 33.8 +/- 9.3 mum and 6.8 +/- 3.8 mum, respectively. CONCLUSIONS: Despite significant differences in mean keratometry readings and anterior and posterior elevation measurements among the three systems, the keratometry readings can be used interchangeably, as this difference is not clinically significant.
机译：目的：评估Galilei V4.01（Ziemer），Orbscan IIz（Bausch＆Lomb）和角膜地形图仪（Costruzione Strumenti Oftalmici）系统在角膜测定法读数和前后高程图测量方面的一致性。方法：这项前瞻性比较研究包括92位连续屈光手术候选人的184只眼，同时接受了Galilei（双Scheimpflug），Orbscan II（扫描狭缝）和Corneal Map地形图仪（基于Placido盘片）系统的检查。分别使用方差分析和配对t检验比较了角膜测量法读数以及前后高程图测量结果。结果：用Galilei，Orbscan和Corneal Map地形图绘制者的平均角膜曲率读数分别为44.30 +/- 1.49屈光度（D），44.11 +/- 1.47 D和44.60 +/- 1.56D。尽管平均角膜曲率法存在显着差异（P <.001），但这三个系统之间的相关性很强。两组在模拟角膜曲率和散光方面的最大平均差为<0.50D。在评估前最佳适应球（BFS）和后散光时，伽利略和Orbscan II之间的相关性分别为0.960和0.947。 。 Orbscan II和Galilei测量的最大前中央高程分别为9.2 +/- 5.1微米和3.2 +/- 1.8微米。 Orbscan II和Galilei的最大后中央高程分别为33.8 +/- 9.3毫米和6.8 +/- 3.8毫米。结论：尽管这三个系统在平均角膜曲率读数和前后高度测量方面存在显着差异，但该角膜曲率读数可以互换使用，因为这种差异在临床上并不显着。

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