<unk>  <unk>  is a group of destructive inflammatory diseases involving the<unk>  cornea in human eyes. The symptoms of<unk>  include pain, redness of the eyeball, photophobia, and decreased vision accompanied by distinctive signs of crescent-shaped damage of the cornea. The causes of this disease are broad, ranging from injuries, contamination of contact lenses, to association with other systemic conditions.<unk>  is associated with different ocular and systemic diseases. Mooren's ulcer is a common form of<unk> . The majority of<unk>  is mediated by local or systemic immunological processes, which can lead to inflammation and eventually tissue damage. Standard<unk>  diagnostic test involves reviewing the medical history and a completing physical examinations. Two major treatments are the use of medications such as corticosteroids or other immunosuppressive agents and surgical resection of the conjunctiva. The prognosis of<unk>  is unclear with one study providing potential complications.<unk>  is a rare condition with an estimated incidence of 3 per million annually.
Peripheral ulcerative keratitis
Interstitial keratitis
Nummular keratitis
Neurotrophic keratitis
Lattice corneal dystrophy
Diffuse lamellar keratitis
Granular corneal dystrophy
Subepithelial mucinous corneal dystrophy