Fig. 3. Enzyme-linked immunosorbent assay analysis of (A) angiogenin (ANG) and (B) lactoferrin (LF) in dry eye syndrome (DES) patients (classified according to grade) and normal controls. The percentage concentrations of ANG and LF relative to total tear proteins were measured. Statistically significant correlations between DES severity and the percentage concentrations of both ANG (A) and LF (B) were noted. The group-to-group differences of ANF and LF also were statistically significant, except between DES grades 1 and 2 (^*p < 0.05).