Table 1 Subjective classification of SM-induced corneal injury based on clinical features.

From: Artificial intelligence derived grading of mustard gas induced corneal injury and opacity

Clinical feature

Severity of the disease

Healthy

Mild

Moderate

Severe

Iris visible

✔

✔

Partial

✖

Corneal haze

✖

✔

✔

✔

Blood vessels- 1–2 mm not reaching the central cornea

✖

✖

✔

✔

Blood vessels- more than 4 mm reaching the central cornea

✖

✖

✖

✔

Epithelial defect

✖

✖

✔

✔

  1. The grading was performed based on the iris visible/not visible, corneal haze, extent of blood vessel invasion (categorized by proximity to the central cornea), and epithelial defects were noted as either absent (✖), partial or present (✔).
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