Comparison of Fourier-Domain and Time-Domain Optical Coherence Tomography for Assessment of Corneal Thickness and Intersession Repeatability

The corneal thickness measurements between TD-OCT and FD-OCT were highly correlated but not similar. Conversion equations may be used for central and paracentral, but not for minimum, corneal thickness. Even though both the OCT instruments had good reliability, FD-OCT was better.