Hirji N K, Larke J R
Am J Optom Physiol Opt. 1978 Feb;55(2):97-100. doi: 10.1097/00006324-197802000-00006.
In the hands of trained user, the topographic pachometer proves to be an instrument of acceptable clinical precision (standard deviation = 0.006mm). An examination of corneal thinning during waking hours revealed a rate of thinning which was greatest upon lid opening and which declined uniformly throughout the day (p = 0.01). An investigation into menstrually related change in corneal thickness revealed that at least 122 subjects would be required to investigate this change on an acceptable statistical basis (p = 0.05).
在经过训练的使用者手中，地形图测厚仪被证明是一种具有可接受临床精度的仪器（标准差 = 0.006 毫米）。对清醒时角膜变薄情况的检查发现，变薄速率在睁眼时最大，且在一天中均匀下降（p = 0.01）。对与月经相关的角膜厚度变化的调查表明，至少需要 122 名受试者才能在可接受的统计学基础上研究这种变化（p = 0.05）。
