Suppr超能文献

6 种仪器测量角膜散光的单变量和双变量极差值分析。

Univariate and bivariate polar value analysis of corneal astigmatism measurements obtained with 6 instruments.

机构信息

Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea.

出版信息

J Cataract Refract Surg. 2012 Sep;38(9):1608-15. doi: 10.1016/j.jcrs.2012.04.035. Epub 2012 Jul 15.

Abstract

PURPOSE

To compare the corneal astigmatism measurements from 6 instruments in preoperative assessment for toric intraocular lens (IOL) implantation.

SETTING

Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, South Korea.

DESIGN

Prospective comparative observational study.

METHODS

This study included patients with cataract and more than 1.00 diopter (D) of corneal astigmatism. For preoperative evaluation of toric IOL implantation, the net astigmatism was evaluated using manual keratometry, autokeratometry, partial coherence interferometry (PCI) (IOLMaster), corneal topography/ray-tracing aberrometry (iTrace), scanning-slit topography (Orbscan), and Scheimpflug imaging (Pentacam). All net astigmatisms were converted to polar values. Using the astigmatism measurements from manual keratometry as a standard, Bland-Altman analysis, linear mixed-model, and bivariate graphic analysis were performed.

RESULTS

The study group comprised 257 eyes of 141 patients. Bland-Altman plots showed good agreement between manual keratometry and each instrument for polar values. There was no significant between-instrument difference in KP(90) and KP(135) in the linear mixed model analysis or in bivariate polar values in bivariate confidence ellipses.

CONCLUSION

The corneal astigmatism measurements from autokeratometry, PCI, corneal topography/ray-tracing aberrometry, scanning-slit topography, and Scheimpflug imaging were comparable to those from manual keratometry and can be used interchangeably with manual keratometry to measure corneal astigmatism.

摘要

目的

比较 6 种仪器在用于测量拟植入散光人工晶状体(IOL)的角膜散光时的测量结果。

设置

韩国延世大学医学院眼科视觉研究所。

设计

前瞻性比较观察性研究。

方法

本研究纳入了伴有白内障且角膜散光大于 1.00 屈光度(D)的患者。在进行散光 IOL 植入术前评估时,采用手动角膜曲率计、自动角膜曲率计、部分相干干涉测量法(IOLMaster)、角膜地形图/光线追踪像差仪(iTrace)、扫描-slit 角膜地形图(Orbscan)和Scheimpflug 成像仪(Pentacam)来评估总散光。所有的总散光均转换为极坐标值。以手动角膜曲率计的散光测量值为标准,进行 Bland-Altman 分析、线性混合模型分析和双变量图形分析。

结果

研究组包括 141 例患者的 257 只眼。Bland-Altman 图显示,在极坐标值方面,手动角膜曲率计与其他各仪器之间具有良好的一致性。线性混合模型分析或双变量极坐标值的双变量置信椭圆分析均未显示在 KP(90)和 KP(135)方面存在仪器间差异。

结论

自动角膜曲率计、PCI、角膜地形图/光线追踪像差仪、扫描-slit 角膜地形图和 Scheimpflug 成像仪的角膜散光测量值与手动角膜曲率计的测量值具有可比性,可以与手动角膜曲率计互换使用,以测量角膜散光。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验