Keratectasia

from Wikipedia, the free encyclopedia
Classification according to ICD-10
H18.7 Other corneal deformities - keratectasia
Q13.4 Congenital Keratectasia
ICD-10 online (WHO version 2019)

The keratectasia is a pathological thinning of the cornea with bulging outward.

It is a circumscribed expansion and expansion of the cornea, mostly at the edge (marginal ectasia) and can occur after an imperforate ulcer of the cornea.

A keratectasia can early symptom of a keratoconus be (primary keratectasia), or as a complication of an eye treatment laser occur (secondary keratectasia).

The iatrogenic ectasia can rapidly, but later develop until years, the incidence is estimated to be 0.04 to 2.8%.

It is characterized by progressive myopia with astigmatism with a reduction in visual acuity .

Thin or abnormally shaped corneas, severe nearsightedness (over 8 diopters ), young age, neurodermatitis , familial occurrence of keratoconus or connective tissue diseases are regarded as risk factors .

diagnosis

The diagnosis is carried out by the ophthalmological examination.

therapy

In addition to conservative therapy for myopia, surgical procedures such as keratoplasty , collagen crosslinking or the implantation of ring segments are possible.

See also

swell

  • Pschyrembel: Clinical Dictionary. 256th edition. De Gruyter, Berlin / New York 1990, ISBN 3-11-010881-X .
  • Franz Grehn: Ophthalmology. 30th edition. Springer Verlag, Berlin 2008, ISBN 978-3-540-75264-6 .

Individual evidence

  1. ↑ a b Entry on keratectasia in the Flexikon , a Wiki of the DocCheck company
  2. ↑ Willibald Pschyrembel : Clinical Dictionary , 266th, updated edition, de Gruyter, Berlin 2014, ISBN 978-3-11-033997-0, keyword: keratectasia
  3. ^ M. Kohlhaas: Iatrogenic keratectasia - an overview. In: Clinical monthly sheets for ophthalmology. Vol. 232, No. 6, June 2015, pp. 765-772, doi: 10.1055 / s-0035-1545737 , PMID 25853948 (review).
  4. ↑ M. Kohlhaas, E. Spoerl, A. Speck, T. Schilde, D. Sandner, LE Pillunat: A new treatment of keratectasia after LASIK through collagen crosslinking with riboflavin / UVA light. In: Clinical monthly sheets for ophthalmology. Vol. 222, No. 5, May 2005, pp. 430-436, doi: 10.1055 / s-2005-857950 , PMID 15912463 .
  5. ↑ M. El-Husseiny, L. Daas, A. Langenbucher, B. Seitz: Intracorneal ring segments in keratectasia - interim results and potential complications. In: Clinical monthly sheets for ophthalmology. Vol. 233, No. 6, June 2016, pp. 722-726, doi: 10.1055 / s-0042-108653 , PMID 27315293 .