Snyder A C
Am J Optom Physiol Opt. 1984 Jun;61(6):408-13.
Polymethyl methacrylate (PMMA) lenses of known thickness were measured by one investigator with a pachometer. This experienced pachometrist held variation in thickness measurements to within 1% over time. The measurements were repeatable with a SD less than 1%. The data indicate that measured corneal thickness changes should be greater than 1 to 2% to be considered true changes in thickness.
由一名研究人员使用角膜厚度仪对已知厚度的聚甲基丙烯酸甲酯（PMMA）镜片进行测量。这位经验丰富的角膜厚度测量师在一段时间内将厚度测量的变化控制在1%以内。测量结果具有可重复性，标准差小于1%。数据表明，测得的角膜厚度变化应大于1%至2%才能被视为真正的厚度变化。
