Corneal ectatic disorders
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]
- 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
corneal transplant
for advanced cases.
References
- ^ "Corneal ectatic disorders (keratoconus and pellucid marginal degeneration)". AAO ONE Network. American Academy of Ophthalmology.
- ^ Weissman, Barry A; Yeung, Karen K (2019-05-30). "Keratoconus". Medscape.
- PMID 23807384.
- ^ Rasheed, Karim; Rabinowitz, Yaron (2018-12-24). "Pellucid Marginal Degeneration". Medscape.
- ^ "Ectasia After LASIK". American Academy of Ophthalmology.
- ^ "Terrien marginal degeneration". American Academy of Ophthalmology.
- PMID 19050464.
- PMID 18041254.
- S2CID 38858189.