Figure 2. Morphological properties of ultraviolet (UV)-irradiated corneas treated with AST after irradiation. Eyes were treated with AST eye drops within 5 min after UVB exposure (A: 1 mg/ml, B: 0.1 mg/ml). Control subjects were not irradiated with UVB (C). The mean values of corneal epithelial thickness are summarized (D). Epithelia were significantly thicker when treated with 1 mg/ml AST compared to fellow eyes as controls (p<0.01). The protective effects of AST remained, even if eyes were treated after irradiation.