Figure 4. Reactive oxygen species signal expression after UVB exposure. Reactive oxygen species (ROS) were strongly detected (red) in
untreated corneal epithelium after UVB irradiation (
A). The ROS signal was weak in AST treated corneas (
B) and close to unspecific ROS signaling in naïve corneas (
C). The mean gray values of the corneal epithelium of DHE stained slides were evaluated by
Image J software and summarized (
D). Mean gray values were significantly lower in corneas treated with 1 mg/ml AST eye drops than in the vehicle-treated eyes
(p<0.05).