<unk>  is a benign, self-limiting inflammatory disease affecting part of the eye called the episclera. The episclera is a thin layer of tissue that lies between the conjunctiva and the connective tissue layer that forms the white of the eye (sclera).<unk>  is a common condition, and is characterized by the abrupt onset of painless eye redness. There are two types of<unk> , nodular and simple. Nodular<unk>  lesions have raised surface. Simple<unk>  lesions are flat. There are two subtypes. In diffuse simple<unk> , inflammation is generalized. In sectoral simple<unk> , the inflammation is restricted to one region. Most cases of<unk>  have no identifiable cause, although about a third of cases are associated with various systemic diseases. Often people with<unk>  experience it recurrently. Treatment focuses on decreasing discomfort, and includes lubricating eye drops. More severe cases may be treated with topical corticosteroids or oral anti-inflammatory medications (NSAIDs).
Episcleritis
Scleritis
Retinal vasculitis
Hypertensive retinopathy
Diabetic retinopathy
Corneal neovascularization
Interstitial keratitis
Corneal hydrops