Two methods measure corneal thickness in human eyes, showing significant measurement differences.
Twelve human eyes had central corneal thickness measurements made by two investigators with the Haag‐Streit 900 slitlamp and standard pachometer. Two endpoint methods were used for the final corneal thickness measurement setting in the microscope viewing eyepiece. The two methods used were (1) a touching of the epithelium/endothelium corneal split images and (2) an overlapping of the split images. Although final thickness measurements of the two investigators were similar, the results reveal a statistically significant difference for the two measurement methods.
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Molinari et al. (1983) studied this question.