Idiopathic limbal squamous metaplasia.

Squamous metaplasia is an abnormal epithelial differentiation represented on the ocular surface by a spectrum of skin-like changes of conjunctival and corneal epithelium. This pathologic condition can be observed in a variety of ocular surface disorders, including systemic vitamin A deficiency and cicatricial keratoconjunctivitis. We recently encountered a patient with a progressively enlarging limbal epithelial ovoid lesion, who was given a histologic diagnosis of corneal and conjunctival squamous metaplasia of unknown cause. Herein we report this rare case and our successful surgical management of the lesion.