Corneal ectatic disorders

In today's world, Corneal ectatic disorders has become a topic of great relevance and interest to many people in different fields. Whether due to its impact on society, its implications in daily life or its significance in history, Corneal ectatic disorders is a topic that deserves to be analyzed and discussed in depth. From its origins to its impact today, Corneal ectatic disorders has aroused the interest of academics, experts, and the general public, which is why it is essential to explore its different edges and dimensions. In this article, we will delve into the exciting world of Corneal ectatic disorders, to learn in detail about its characteristics, challenges and opportunities, with the aim of expanding our knowledge and understanding of this fascinating topic.

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]

Types

  • 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]

Diagnosis

Usually diagnosed clinically by several clinical tests. Although some investigations might needed for confirming the diagnosis and to differentiate different types of corneal ectatic diseases.[citation needed]

  • Corneal topography
  • Corneal tomography

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.
  2. ^ Weissman, Barry A; Yeung, Karen K (2019-05-30). "Keratoconus". Medscape.
  3. ^ Wallang, B S; Das, S (28 June 2013). "Keratoglobus". Eye. 27 (9): 1004–1012. doi:10.1038/eye.2013.130. PMC 3772364. PMID 23807384.
  4. ^ Rasheed, Karim; Rabinowitz, Yaron (2018-12-24). "Pellucid Marginal Degeneration". Medscape.
  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. doi:10.1097/OPX.0b013e31818e8eaa. PMC 2614306. PMID 19050464.
  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. 23 (9): 960–4. doi:10.3928/1081-597x-20071101-18. PMID 18041254.
  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. doi:10.1097/icl.0000000000000091. PMID 25320956. S2CID 38858189.
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