Cogan’s syndrome
a condition in which keratitis is associated with attacks of vertigo, tinnitus, and deafness. Pain in the eyes and reduced vision are also experienced. As the vertigo subsides (usually within days), the patient may become deaf or, in rare cases, blind. It is believed to be an autoimmune disorder. Also called nonsyphilitic interstitial keratitis. [described in 1945 by David Glendenning Cogan (1908–1993), U.S. physician]