Scleritis is a potentially serious inflammation of the sclera, commonly called the white of the eye. It is the tough, white tissue that gives the eye its shape and protects the eye. More than 50% of cases of scleritis are associated with another disease that affects the whole body, such as rheumatoid arthritis, or are caused by infection or injury. Scleritis occurs most often in people aged 30 to 60 and is rare in children. If left untreated, the condition can spread to parts of other parts of the eye. Some visual loss could then occur.