Scleritis can be classified as anterior scleritis and posterior scleritis. Its causes are scleritis & degeneration of sclera in pathological myopia. Its common causes are thinning of sclera following perforating injury, scleritis & absolute glaucoma. Episcleritis is inflammation of the episclera, a less serious condition that seldom develops into scleritis. The most severe complications are associated with necrotizing scleritis. A blue color to the sclera suggests scleritis, rather than episcleritis. Secondary keratitis or uveitis may occur with scleritis. Although rare, some cases may progress to scleritis. Rarely, episcleritis may be caused by scleritis. Scleritis that is necrotizing is found to be exceedingly rare. The cephalopharyngeal skeleton has very short dorsal and ventral apodemes, the hypostomal scleritis is triangular. Simply using eye drops will not treat scleritis. Necrotising scleritis accounts for 13% of the cases. If not treated, scleritis can cause blindness.