Figure 1. The alterations of the ocular surface after BAC treatment. Phenol red thread test showed decreased tear volume production (A), and decreased BUTs were described (B). Increased corneal fluorescein staining and rose bengal scores of ocular surface were recorded (C and D, respectively). *p<0.05, **p<0.01, ***p<0.001, respectively. Representative examples for each scale of fluorescein sodium staining (E-H, 0, 1, 2, 3 points respectively), and rose bengal staining (I-L, 0, 1, 2, 3 points respectively).