SCLEROMALACIA PERFORANS: Scleromalacia perforans is a painless form of necrotizing scleritis that has no obvious inflammatory signs.
A progressive thinning of the sclera characterizes it. The eye develops a bluish color in the affected regions as uveal pigment begins to show through the thinned sclera.Despite its name, scleromalacia perforans rarely results in perforation. Gross bulging of the ocular surface or rupture secondary to trauma can require tectonic repair with a scleral graft.

CONGENITAL MELANOSIS OCULI: Melanosis oculi (ocular melanocytosis) is congential blue nevus of the episclera and sclera associated with increased pigmentation of the uveal tract.Multiple gray patches are seen in the sclera and spiscleram and the Ipsilateral iris and fundus are darker than those of the unaffected eye.Melanosis oculi with melanosis of the Ipsilateral eyelid skin is referred to as oculodermal melanocytosis (nevus of Ota).The most serious complication of oculodermal melanocytosis is malignant transformation, although this is rare and seems to occur only in white patients. Malignant transformation in the skin, conjucntiva, orbit, and meninges is possible but rare.