Rengstorff R H
J Am Optom Assoc. 1985 Mar;56(3):218-9.
The refractive power of the cornea may change after wearing contact lenses and as a result of disease or surgery. Each corneal component that contributes to the refractive power was analyzed and their relative significance was determined by comparing the refractive effects of a 10% change. In order of magnitude, the effect of a 10% change in each component was as follows: anterior corneal curvature (4.87 D), index of refraction (1.87 D), depth of anterior chamber (1.20 D), posterior corneal curvature (0.62 D) and corneal thickness (0.01 D). Refractive changes are the result of increases and decreases of each component and the total effect is the sum of the individual changes in each component.
佩戴隐形眼镜后以及由于疾病或手术，角膜的屈光力可能会发生变化。对每个对屈光力有贡献的角膜成分进行了分析，并通过比较10%变化的屈光效应来确定它们的相对重要性。按量级排序，每个成分10%变化的效应如下：角膜前表面曲率（4.87 D）、折射率（1.87 D）、前房深度（1.20 D）、角膜后表面曲率（0.62 D）和角膜厚度（0.01 D）。屈光变化是每个成分增加和减少的结果，总效应是每个成分个体变化的总和。
