期刊
CONTACT LENS & ANTERIOR EYE
卷 35, 期 3, 页码 129-136出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.clae.2012.01.006
关键词
Rigid contact lens; Corneal thickness; Corneal topography; Pentacam; Wavefront error; Corneal refractive power
资金
- Cornea and Contact Lens Society of Australia
Purpose: The aim of this cross-over study was to investigate the changes in corneal thickness, anterior and posterior corneal topography, corneal refractive power and ocular wavefront aberrations, following the short term use of rigid contact lenses. Method: Fourteen participants wore 4 different types of contact lenses (RGP lenses of 9.5 mm and 10.5 mm diameter, and for comparison a PMMA lens of 9.5 mm diameter and a soft silicone hydrogel lens) on 4 different days for a period of 8 h on each day. Measures were collected before and after contact lens wear and additionally on a baseline day. Results: Anterior corneal curvature generally showed a flattening with both of the RGP lenses and a steepening with the PMMA lens. A significant negative correlation was found between the change in corneal swelling and central and peripheral posterior corneal curvature (all p <= 0.001). RGP contact lenses caused a significant decrease in corneal refractive power (hyperopic shift) of approximately 0.5 D. The PMMA contact lenses caused the greatest corneal swelling in both the central (27.92 +/- 15.49 mu m, p < 0.001) and peripheral (17.78 +/- 12.11 mu m, p = 0.001) corneal regions, a significant flattening of the posterior cornea and an increase in ocular aberrations (all p <= 0.05). Conclusion: The corneal swelling associated with RGP lenses was relatively minor, but there was slight central corneal flattening and a clinically significant hyperopic change in corneal refractive power after the first day of lens wear. The PMMA contact lenses resulted in significant corneal swelling and reduced optical performance of the cornea. (C) 2012 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据