Holden B A, Zantos S G
Am J Optom Physiol Opt. 1981 Feb;58(2):139-43. doi: 10.1097/00006324-198102000-00004.
The assumption that a properly fitted soft contact lens conforms to the shape of the cornea in the central region was tested by measuring the apparent radius of curvature of the back surface of various soft contact lenses on the eye, with a high illumination keratometer. Real radius of curvature was calculated by means of an appropriate formula. It was found that soft lenses conform closely to the corneal shape. The mean difference between the radius of the back surface of the lens and corneal radius of curvature was +0.015 mm in the horizontal meridian, and +0.023 mm in the vertical meridian. The lenses were slightly flatter than the cornea in each meridian. The difference in conformity between the horizontal and vertical meridians was not significant. Slight differences were found in the degree of conformity of the three soft contact lens designs studied. The thicker, lower water content lenses showed slightly less conformity.
通过使用高照明角膜曲率计测量各种佩戴在眼睛上的软性隐形眼镜后表面的表观曲率半径，对合适佩戴的软性隐形眼镜在中央区域符合角膜形状这一假设进行了测试。通过适当的公式计算实际曲率半径。结果发现软性隐形眼镜与角膜形状紧密相符。镜片后表面半径与角膜曲率半径在水平子午线上的平均差值为 +0.015 毫米，在垂直子午线上为 +0.023 毫米。在每个子午线上，镜片都比角膜略平。水平和垂直子午线之间的相符程度差异不显著。在所研究的三种软性隐形眼镜设计的相符程度上发现了细微差异。较厚、含水量较低的镜片显示出的相符程度略低。
