Keratectasia after Laser in situ Keratomileusis
- 1 December 2005
- journal article
- case report
- Published by S. Karger AG in Ophthalmologica
- Vol. 220 (1), 58-64
- https://doi.org/10.1159/000089276
Abstract
Purpose: To describe the morphological features of a prominent ectasia of the cornea after laser in situ keratomileusis (LASIK). Methods: The morphology of the ectatic corneas was examined using corneal topography, light microscopy and transmission electron microscopy in 2 cases who underwent penetrating keratoplasty due to poor visual acuity induced by progressive corneal ectasia after LASIK. Results: On topographic examination, the apex of the corneal surface was observed within the central 3-mm zone, and the smallest thickness was 0.116 and 0.271 mm in each case. On histological examination, the epithelial layer became thinner and detached easily. Bowman’s membrane was broken down and folded. An irregular arrangement of the stromal lamellae with fibroblastic keratocytes was found. The fulled fiber cell, a transformed epithelial cell, was visible in a plane on Bowman’s layer in the central region. In contrast, the corneal endothelium was intact, and no abnormality was found in both cases. Conclusion: On morphological examination of 2 cases with corneal ectasia, a forward protrusion of both the anterior and posterior corneal surfaces occurred, and epithelial detachment, Bowman’s membrane breakage and folding and irregular lamellae were found. The 2 cases had greatly thinned and protruding corneas, yet there was no abnormality in the corneal endothelium.Keywords
This publication has 10 references indexed in Scilit:
- Penetrating keratoplasty for iatrogenic keratoconus after repeat myopic laser in situ keratomileusis: Histologic findings and literature reviewJournal of Cataract & Refractive Surgery, 2003
- Management of Post-LASIK Corneal Ectasia With Intacs InsertsAmerican Journal of Ophthalmology, 2003
- Progressive post-LASIK keratectasiaJournal of Cataract & Refractive Surgery, 2002
- Corneal Ectasia After Laser-Assisted In Situ KeratomileusisAmerican Journal of Ophthalmology, 2001
- Corneal ectasia after laser in situ keratomileusisJournal of Cataract & Refractive Surgery, 2001
- Bilateral severe keratoconus after laser in situ keratomileusis in a patient with forme fruste keratoconusJournal of Cataract & Refractive Surgery, 2001
- Corneal ectasia detected after laser in situ keratomileusis for correction of less than −12 diopters of myopiaJournal of Cataract & Refractive Surgery, 2000
- Delayed onset keratectasia following laser in situ keratomileusisJournal of Cataract & Refractive Surgery, 1999
- Iatrogenic keratectasia after LASIK in a case of forme fruste keratoconusJournal of Cataract & Refractive Surgery, 1998
- Histopathological Variation in KeratoconusCornea, 1992