硬性透气性角膜接触镜引起的角膜翘曲中角膜非球面性的改变。

Alteration of corneal asphericity in rigid gas permeable contact lens induced warpage.

作者信息

Maeda N, Klyce S D, Hamano H

机构信息

Lions Eye Research Laboratories, LSU Eye Center, Louisiana State University Medical Center School of Medicine, New Orleans 70112.

出版信息

CLAO J. 1994 Jan;20(1):27-31.

PMID:8149570

Abstract

We developed the corneal asphericity index (CAI), which indicates the asphericity of the central cornea using the TMS-1 videokeratoscope, and used the CAI to evaluate both normal corneas and corneas with rigid gas permeable (RGP) lens induced warpage. The CAI (mean +/- standard deviation) for the 22 control corneas was 0.33 +/- 0.26, which indicates that the normal central cornea has a prolate shape. The average CAI for the 24 corneas with RGP lens induced warpage was significantly lower (-0.15 +/- 0.36, P = 0.0001). These data suggest that some corneas have abnormal asphericity in the central cornea when warpage occurs with RGP lenses. CAI is useful for the quantitative assessment of asphericity and topographic abnormalities in the central cornea caused by contact lens induced warpage.

摘要

我们开发了角膜非球面性指数（CAI），该指数使用TMS-1型角膜地形图仪来指示中央角膜的非球面性，并使用CAI来评估正常角膜以及因佩戴硬性透气性（RGP）镜片而导致角膜变形的情况。22只对照角膜的CAI（平均值±标准差）为0.33±0.26，这表明正常中央角膜呈长椭圆形。24只因佩戴RGP镜片而导致角膜变形的角膜的平均CAI显著更低（-0.15±0.36，P = 0.0001）。这些数据表明，当RGP镜片导致角膜变形时，一些角膜的中央角膜非球面性会出现异常。CAI有助于定量评估由隐形眼镜导致的角膜变形所引起的中央角膜非球面性和地形异常。