Sanaty M, Temel A
Department of Ophthalmology, Marmara University, Istanbul, Turkey.
CLAO J. 1996 Jul;22(3):186-8.
To determine the changes in corneal curvature among soft and rigid gas permeable (RGP) contact lens wearers, we compared horizontal, vertical, and total astigmatism values in 80 subjects before and after 2 years of contact lens wear.
The soft contact lens wearer group was composed of 40 subjects. The changes in corneal curvature that occurred in this group over the 2-year study period were not statistically significant. The RGP contact lens group also comprised 40 subjects. This group, however, did show significant steepening in vertical axis, but changes in corneal astigmatism values were not statistically significant.
The high oxygen transmissibility and relative flexibility of RGP contact lenses compared to polymethylmethacrylate contact lenses may be the factors responsible for the limited corneal curvature changes that occurred during our 2-year study.
为了确定软性和硬性透气性（RGP）隐形眼镜佩戴者角膜曲率的变化，我们比较了80名受试者在佩戴隐形眼镜2年前后的水平、垂直和总散光值。
软性隐形眼镜佩戴者组由40名受试者组成。在为期2年的研究期间，该组发生的角膜曲率变化无统计学意义。RGP隐形眼镜组也由40名受试者组成。然而，该组在垂直轴上确实出现了明显变陡，但角膜散光值的变化无统计学意义。
与聚甲基丙烯酸甲酯隐形眼镜相比，RGP隐形眼镜的高透氧性和相对柔韧性可能是导致我们2年研究期间角膜曲率变化有限的因素。
