World Library  
Flag as Inappropriate
Email this Article

Corneal ectatic disorders

Article Id: WHEBN0045350427
Reproduction Date:

Title: Corneal ectatic disorders  
Author: World Heritage Encyclopedia
Language: English
Subject: Keratoconus, Irvine-Gass syndrome, Terrien's marginal degeneration, Actinic conjunctivitis, Ischemic optic neuropathy
Collection: Diseases of the Eye and Adnexa, Disorders of Sclera and Cornea
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Corneal ectatic disorders

The "conical cornea" that is characteristic of keratoconus.

Corneal ectatic disorders or corneal ectasia are a group of uncommon, noninflammatory, eye disorders characterised by bilateral thinning of the central, paracentral, or peripheral cornea.[1]

  • Keratoconus, a progressive, noninflammatory, bilateral, asymmetric disease, characterized by paraxial stromal thinning and weakening that leads to corneal surface distortion.[2]
  • Keratoglobus, a rare noninflammatory corneal thinning disorder, characterised by generalised thinning and globular protrusion of the cornea.[3]
  • Pellucid marginal degeneration, a bilateral, noninflammatory disorder, characterized by a peripheral band of thinning of the inferior cornea.[4]
  • Posterior keratoconus, a rare condition, usually congenital, which causes a nonprogressive thinning of the inner surface of the cornea, while the curvature of the anterior surface remains normal. Usually only a single eye is affected.
  • Post-LASIK ectasia, a complication of LASIK eye surgery.[5]
  • Terrien's marginal degeneration, a painless, noninflammatory, unilateral or asymmetrically bilateral, slowly progressive thinning of the peripheral corneal stroma.[6]

Treatment

Treatment options include contact lenses and intrastromal corneal ring segments for correcting refractive errors caused by irregular corneal surface,[7][8] corneal collagen cross-linking to strengthen a weak and ectatic cornea,[9] or corneal transplant for advanced cases.

References

  1. ^ "Corneal ectatic disorders (keratoconus and pellucid marginal degeneration)". AAO ONE Network.  
  2. ^ Weissman, Barry A; Yeung, Karen K. "Keratoconus". Medscape. 
  3. ^ Wallang, B S; Das, S (28 June 2013). "Keratoglobus". Eye 27 (9): 1004–1012.  
  4. ^ Rasheed, Karim; Rabinowitz, Yaron. "Pellucid Marginal Degeneration".  
  5. ^ "Ectasia After LASIK". American Academy of Ophthalmology. 
  6. ^ "Terrien marginal degeneration". American Academy of Ophthalmology. 
  7. ^ Marsack, Jason D.; Parker, Katrina E.; Applegate, Raymond A. (December 2008). "Performance of Wavefront-Guided Soft Lenses in Three Keratoconus Subjects". Optometry and Vision Science 85 (12): E1172–E1178.  
  8. ^ Marsack, JD; Parker, KE; Niu, Y; Pesudovs, K; Applegate, RA (November 2007). "On-eye performance of custom wavefront-guided soft contact lenses in a habitual soft lens-wearing keratoconic patient.". Journal of refractive surgery (Thorofare, N.J. : 1995) 23 (9): 960–4.  
  9. ^ Avni-Zauberman, N; Rootman, DS (November 2014). "Cross-linking and intracorneal ring segments--review of the literature.". Eye & contact lens 40 (6): 365–70.  

External links

  • International Journal of Keratoconus and Ectatic Corneal Diseases
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.