Corneal dystrophy, Cogan
A disorder in which the cornea (the normally clear front window of the eye) shows grayish fingerprint lines, geographic map-like lines, and dots (or microcysts) on examination with a slit-lamp that focuses a high intensity light beam as a slit while the examiner looks at the front of the eye through a magnifying scope. The disorder is usually silent and without symptoms. However, about one patient in ten has recurrent erosion of the cornea that usually begins after the age 30. Conversely, half of patients with recurrent corneal erosions of idiopathic (unknown) origin have this disorder. Under the microscope, a structure called the epithelial basement membrane is abnormal. The disorder is therefore sometimes called epithelial basement corneal dystrophy. The disorder was first described by Cogan and colleagues in 1964. Hence, the name: Cogan corneal dystrophy. It is also known descriptively (to add to the confusion) as map-dot-fingerprint type corneal dystrophy and microcystic corneal dystrophy.

Medical dictionary. 2011.

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  • Cogan corneal dystrophy — A disorder in which the cornea (the normally clear front window of the eye) shows grayish fingerprint lines, geographic map like lines, and dots (or microcysts) on examination with a slit lamp that focuses a high intensity light beam as a slit… …   Medical dictionary

  • Corneal dystrophy, epithelial basement — A disorder in which the cornea (the normally clear front window of the eye) shows grayish fingerprint lines, geographic map like lines, and dots (or microcysts) on examination with a slit lamp that focuses a high intensity light beam as a slit… …   Medical dictionary

  • Corneal dystrophy, map-dot-fingerprint type — A disorder in which the cornea (the normally clear front window of the eye) shows geographic map like lines, dots (or microcysts), and grayish fingerprint lines on examination with a slit lamp, a device that focuses a high intensity light beam as …   Medical dictionary

  • Corneal dystrophy, microcystic — A disorder in which the cornea (the normally clear front window of the eye) shows dots (or microcysts), geographic map like lines, and grayish fingerprint lines on examination with a slit lamp, a device that focuses a high intensity light beam as …   Medical dictionary

  • Epithelial basement corneal dystrophy — A disorder in which the cornea (the normally clear front window of the eye) shows grayish fingerprint lines, geographic map like lines, and dots (or microcysts) on examination with a slit lamp that focuses a high intensity light beam as a slit… …   Medical dictionary

  • Map-dot-fingerprint type corneal dystrophy — A disorder in which the cornea (the normally clear front window of the eye) shows geographic map like lines, dots (or microcysts), and grayish fingerprint lines on examination with a slit lamp, a device that focuses a high intensity light beam as …   Medical dictionary

  • Microcystic corneal dystrophy — A disorder in which the cornea (the normally clear front window of the eye) shows dots (or microcysts), geographic map like lines, and grayish fingerprint lines on examination with a slit lamp, a device that focuses a high intensity light beam as …   Medical dictionary

  • Cogan syndrome — Classification and external resources DiseasesDB 32705 MeSH D055952 Cogan syndrome is a rare dis …   Wikipedia

  • Corneal ulcer — For the condition in animals, see Corneal ulcers in animals. Corneal ulcer Classification and external resources ICD 10 H16.0 ICD 9 …   Wikipedia

  • Corneal ulcers in animals — Large corneal ulcer in a dog A corneal ulcer, or ulcerative keratitis, is an inflammatory condition of the cornea involving loss of its outer layer. It is very common in dogs and is sometimes seen in cats. In veterinary medicine, the term corneal …   Wikipedia

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