Light eyes are uncommon in patients with solidly pigmented black or dark brown basal-cell carcinomas. All eye colors are found in patients with malignant melanoma. A solidly pigmented black or dark brown malignant lesion, in a patient with blue, gray, or green eyes, is more likely to be a melanoma than a basal-cell carcinoma.
Bart RS, Schnall S. Eye Color in Darkly Pigmented Basal-Cell Carcinomas and Malignant MelanomasAn Aid in Their Clinical Differentiation. Arch Dermatol. 1973;107(2):206-207. doi:10.1001/archderm.1973.01620170018005