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Roper–Hall classification of severity of ocular surface chemical burns (adaptation) [31]
| Grade | Prognosis | Cornea | Limbus |
|---|---|---|---|
| I | Good | Corneal epithelial damage | No limbal ischaemia |
| II | Good | Cornea haze, iris details visible | <1/3 limbal ischaemia |
| III | Guarded | Total epithelial loss, stromal haze, iris details obscured | 1/3–1/2 limbal ischaemia |
| IV | Poor | Cornea opaque, iris & pupil obscured | >1/2 limbal ischaemia |
