Ocular melanocytosisA congenital eye disorder featuring diffuse hyperplasia of melanocytes causing darkening of the iris of the affected eye especially at the pupil margin, brownish discolouration of the episclera, darkening of the fundus, and an increased risk of developing melanomas and GLAUCOMA.
A congenital, usually unilateral lesion, characterized by slate grey areas of increased pigmentation. The pigment is curiously not found in the conjunctival epithelium, but is located in the uvea, sclera and episcleral tissues. It may predispose the individual to uveal melanoma. Syn. congenital melanosis oculi. See naevus of Ota.