子午线(天文学)
角膜曲率计
眼科
角膜
大地测量学
显著性差异
角膜地形图
相关系数
医学
光学
地质学
数学
物理
统计
天文
内科学
作者
Andrew Lam,William A. Douthwaite
标识
DOI:10.1046/j.1475-1313.1996.95000151.x
摘要
Summary A corneal topography study was carried out on Hong Kong Chinese subjects using a modified keratometer. The Chinese corneal topography measured by this modified keratometer was similar to other studies using the Wesley–Jessen Photo Electronic Keratoscopy (PEK) System 2000. The mean p ‐values along the horizontal meridian and the vertical meridian were 0.82 and 0.87, respectively. A negative correlation was found between the p ‐value and the central corneal radius along the horizontal meridian which may indicate that a steeper central cornea will have a greater p ‐value. However, the correlation coefficient of 0.56 was not too certain for this conclusion to be drawn. A difference of 0.04 was found between the horizontal p ‐value and the vertical p ‐value, which may be a result of the tight lid tension along the vertical meridian. This modified keratometer can be considered as an inexpensive instrument for the study of corneal topography.
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