Corneal epithelial thickness analysis of forme fruste keratoconus with optical coherence tomography.

Aim: To explore the significance of corneal epithelial thickness analysis in diagnosing early keratoconus.

Methods: There were 26 clinical keratoconus, 21 forme fruste keratoconus, 40 high corneal astigmatism (ΔK) and 40 low ΔK eyes involved in the study. Fourier-domain optical coherence tomography was used to measure the corneal epithelial thickness of four groups.