Fig. 2

Corneal epithelial parameters in normal controls and dry eye patients. The density of superficial epithelial cells (a), outer wing cells (b), inner wing cells (c) and basal epithelial layer (d) was lower in the diseased eyes (non-Sjögren’s dry eye and Sjögren’s syndrome dry eye). Error bars represent standard errors from the mean (SEM). Statistical analysis by ANOVA, ^*P < 0.05 compared to normal controls, ^¥P < 0.05 comparing the NSDE and SSDE groups