Figure 2. The eyes 7 days after the injury using slit lamp, 2A- A: 30–45 s, B: 60–75 s, C: 90–120 s, D: 90–120 s, E: 3–4 min. A and B: The cornea is almost completely recovered with normal diffuse punctate epithelial defects. C and D: A 90–120-s injury, results in 2+ corneal opacity with centrally distributed new vessel formation and pigment deposition on the endothelial layer. E: A 3–4 min injury results in diffuse CO with a large epithelial defect. B: The density of corneal opacity increased with the duration of the injury. CO in all groups were compared by Tukey's Multiple Comparison Test. Statistically significant difference is observed between groups 30–45 s, 60–120 s and 3–4 min injury groups. * p value=0.001 *** p value=0.0009.