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Ocular biomechanics: measurement parameters and terminology.

机译:眼生物力学:测量参数和术语。

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Traditionally, biomechanical properties of the cornea have been assessed in vitro by measuring stress-strain and Young modulus on corneal strips. In 2005, the Ocular Response Analyzer (ORA; Reichert Technologies, Depew, New York) was launched as the first commercial device claiming to provide in vivo measurements of corneal biomechanics.1 It utilizes a dynamic bi-directional ap-planation process in which two applanation pressure measurements are recorded: one while the cornea is moving inward, and the other as the cornea returns. The primary output measurements are Goldmann-cor-related intraocular pressure (IOPg), and a new parameter called corneal hysteresis (CH), denned by Reichert as the difference between the two pressure values of the inward and outward applanations. The ORA provides two additional new parameters: corneal-compensated intraocular pressure (IOPcc) and corneal resistance factor (CRF], which was thought to be an indicator of the overall "resistance" of the cornea.
机译:传统上,角膜的生物力学特性是通过测量角膜条上的应力应变和杨氏模量在体外进行评估的。 2005年,推出了眼反应分析仪(ORA;纽约Depew的Reichert Technologies),这是第一款声称可对角膜生物力学进行体内测量的商业设备。1它利用了动态双向平展过程,其中两个记录压平压力测量值:一次是在角膜向内移动时,另一次是在角膜返回时。主要输出量度是与戈德曼相关的眼内压(IOPg),以及一个称为角膜滞后(CH)的新参数,由Reichert定义为向内压和向外压的两个压力值之差。 ORA提供了两个附加的新参数:角膜补偿眼内压(IOPcc)和角膜抵抗因子(CRF),这被认为是角膜总体“抵抗”的指标。

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