Grade | Prognosis | Cornea | Conjunctiva/limbus |
I | Good | Corneal epithelial damage | No limbal ischaemia |
II | Good | Corneal haze, iris details visible | <1/3 limbal ischaemia |
III | Guarded | Total epithelial loss, stromal haze, iris details obscured | 1/3–½ limbal ischaemia |
IV | Poor | Cornea opaque, iris and pupil obscured | >½ limbal ischaemia |