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Clinical significance of central corneal thickness and comparison of central corneal thickness measurements methods

机译：中央角膜厚度的临床意义及中央角膜厚度测量方法的比较

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Significance of central corneal thickness has been increasing in ophthalmology practice. It is an important clinical evaluation tool especially prior to refractive surgery and in diagnosis of glaucoma and keratoconus. Refractive surgery is planned according to preoperative central corneal thickness measurements. Besides, in order to determine actual intraocular pressure, central corneal thickness is measured and corrected eye pressure is obtained. Today, devices used in measurement of central corneal thickness do the measurement according to two principles. First and relatively older method is ultrasonic method. Optic method is the second and more recent method. In daily practice, the most commonly used clinical method in measurement of central corneal thickness is ultrasound pachymeter. However, this measurement technique requires contact between cornea and probe and gives thinner measurement results compared to the methods that use optic principle. Recently, several technologic methods based on optics have been put in use; they provide advantages of non-contact technique and objective determination of central corneal thickness. Of these methods, most commonly used include Specular Microscopy, Optical coherence tomography, Laser Doppler Interferometry, Optical low coherence reflectometry pachymetry, Optic based topographic mapping (also called screening section pachymetry) and Pentacam. In this article, it was aimed to evaluate importance of central corneal thickness in clinical use and compare measurement methods
机译：在眼科实践中，中央角膜厚度的重要性一直在增加。它是重要的临床评估工具，尤其是在屈光手术之前和青光眼和圆锥角膜的诊断中。根据术前中央角膜厚度的测量计划进行屈光手术。此外，为了确定实际的眼内压，测量中央角膜厚度并获得校正的眼压。如今，用于测量角膜中央厚度的设备根据两个原理进行测量。首先并且是相对较旧的方法是超声方法。光学方法是第二种方法，也是最近的一种方法。在日常实践中，测量中央角膜厚度的最常用临床方法是超声测厚仪。但是，与使用光学原理的方法相比，这种测量技术需要角膜和探头之间的接触，并且测量结果更薄。最近，已经采用了几种基于光学的技术方法。它们提供了非接触技术和客观确定中央角膜厚度的优势。在这些方法中，最常用的包括镜面显微镜，光学相干断层扫描，激光多普勒干涉仪，光学低相干反射仪测厚仪，基于光学的地形图（也称为筛选截面测厚仪）和Pentacam。本文旨在评估中央角膜厚度在临床中的重要性并比较测量方法

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