Fig. 2

(above) Representative image samples stained with fluorescein in each group performed on day 7 (a) control group (b) 1-min PI group (c) 3-min PI group (d) 10-min PI group. (below) Comparison of corneal fluorescein staining scores among the four groups. 2b and 2c shows micropunctate or macropunctate staining of cornea in the 1-min and the 3-min PI groups. The 10-min PI group shows large epithelial defect on superficial cornea (d). No significant differences in the corneal fluorescein staining score at each time point (Steel–Dwass test for the differences among the four groups). Data show means ± standard deviations (error bars). Day 0 indicates the day immediately after PI instillation