Statistical analysis
Independent sample T-test was used to compare sCD14 tear levels, and CD14, TLR-4 and TLR-9 conjunctival expression between groups of patients with VKC and healthy subjects. Paired sample T-test was used to compare sCD14 tear levels, and CD14, TLR-4 and TLR-9 conjunctival expression before and after topical corticosteroid treatment in group A. Clinical parameters were correlated with CD14, TLR-4 and TLR-9 expression levels by Sperman rho test. (SPSS 18, IBM, Chicago: SPSS Inc). P values <0.05 were considered statistically significant.