Moshirfar Majid, Motlagh Mahsaw N, Murri Michael S, Momeni-Moghaddam Hamed, Ronquillo Yasmyne C, Hoopes Phillip C
Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, School of Medicine, University of Utah Salt Lake City, UT, USA.
HDR Research Center, Hoopes Vision, Draper, UT, USA.
Med Hypothesis Discov Innov Ophthalmol. 2019 Fall;8(3):204-218.
Corneal topography is the most widely used technology for examining the anterior corneal surface. Scheimpflug imaging is a newer technique that allows for measurement of both the anterior and posterior corneal surface, which allows for three-dimensional reconstruction of the cornea. This is of particular interest and value in the field of cataract and refractive surgery. The Galilei camera is a commercially available dual Scheimpflug system that combines curvature data from Placido disc-based corneal topography with elevation data from Scheimpflug technology. The addition of Placido disc topography makes the Galilei unique from its more popular counterpart, the Pentacam, which was discussed in Part I. Compared to the Pentacam, and however, the Galilei analyzer is a newer system that has emerged as a valuable screening tool given its dual Scheimpflug capability. In the first article of this series, the authors summarized the refractive indices available on the Pentacam system with the purpose of identifying the best diagnostic parameters for keratoconus. Similarly, the purpose of this article is to summarize corneal surface indices available on the Galilei system and evaluate their use in screening of the refractive surgery candidate. Since post-operative keratectasia is still prevalent, this paper aims to identify the most clinically relevant indices that may be used in pre-operative evaluation.
角膜地形图是检查角膜前表面最广泛使用的技术。Scheimpflug成像技术是一种较新的技术，它可以测量角膜前表面和后表面，从而实现角膜的三维重建。这在白内障和屈光手术领域具有特别的意义和价值。伽利略相机是一种商用双Scheimpflug系统，它将基于Placido盘的角膜地形图的曲率数据与Scheimpflug技术的高度数据相结合。Placido盘地形图的加入使伽利略相机有别于其更受欢迎的同类产品Pentacam，Pentacam将在第一部分中讨论。然而，与Pentacam相比，伽利略分析仪是一个更新的系统，鉴于其双Scheimpflug功能，它已成为一种有价值的筛查工具。在本系列的第一篇文章中，作者总结了Pentacam系统上可用的折射率，目的是确定圆锥角膜的最佳诊断参数。同样，本文的目的是总结伽利略系统上可用的角膜表面指数，并评估它们在屈光手术候选者筛查中的应用。由于术后角膜扩张仍然很普遍，本文旨在确定可用于术前评估的最具临床相关性的指数。
