Corneal ectatic disorders

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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. American Academy of Ophthalmology.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  2. Weissman, Barry A; Yeung, Karen K. "Keratoconus". Medscape.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
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  4. Rasheed, Karim; Rabinowitz, Yaron. "Pellucid Marginal Degeneration". Medscape.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  5. "Ectasia After LASIK". American Academy of Ophthalmology.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  6. "Terrien marginal degeneration". American Academy of Ophthalmology.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  7. Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).
  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. PMID 18041254.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  9. Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).

External links