Table 2. Histological classification of conjunctival melanocytic disease.

1. Hypermelanosis (increased deposition of melanin)

2. Conjunctival melanocytic intraepithelial neoplasia

Intra-epithelial

Benign (C-MIN=0–4)

Malignant (C-MIN ⩾5)

Stromal

Benign (naevus)

Malignant (invasive melanoma)