<unk>  is a condition of the middle ear where one or more foci of irregularly laid spongy bone replace part of normally dense enchondral layer of bony otic capsule in the bony labyrinth. This condition affects one of the ossicles (the stapes) resulting in hearing loss, tinnitus, vertigo or a combination of symptoms. The term<unk>  is something of a misnomer. Much of the clinical course is characterized by lucent rather than sclerotic bony changes, so the disease is also known as otospongiosis.
Otosclerosis
Band keratopathy
Corneal ulcer
Macular corneal dystrophy
Granular corneal dystrophy
Exposure keratopathy
Fundic gland polyposis
Bullous keratopathy