Figure 1 A: Anterior segment photograph of the left eye on presentation in 1995, showing dark, mainly flat patches of pigmentation. B: Initial biopsy specimen of inferonasal iris, showing a small iris fragment with large melanocytic cells on both sides of the iris (haematoxylin‐eosin ×200). C: Iridectomy specimen showing well‐orientated iris with large, densely pigmented, well‐separated cells involving the stroma (haematoxylin‐eosin ×400). D: Bleached section (×400) showing the morphology of the epithelioid cells in greater detail. Although most cells contain small nuclei, occasional cells show larger nuclei within which single nucleoli are present.