Normal Corneal epithelial thickness profiles imaged with OCT.

OCT = optical coherence tomography; SD = spectral domain; TD = time domain; ET = epithelial thickness; CoR = coefficients of repeatability; ICC = intraclass correlation coefficients; NA = not available.CoR was reported as two standard deviations of the difference between two measurements. *CoR was reported as one standard deviation of the differences between two measurements. **CoR was defined as pooled standard deviations of the difference between two measurements. #CoR was concerning about the repeatability of two repeated images in a single measurement.