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[Correction of irregular astigmatism with intracorneal ring segments]
D Touboul1, L Pinsard, N Mesplier
1Service d'ophtalmologie, centre de référence national du Kératocône, centre Xavier-François-Michelet, site Pellegrin, CHU de Bordeaux, place Amélie-Raba-Léon, 33000 Bordeaux, France. toubould@gmail.com
Journal Francais D'Ophtalmologie
|March 2, 2012
Summary
Intracorneal ring segments (ICRS) manage irregular astigmatism in conditions like keratoconus. This technique reshapes the cornea, improving vision in over 70% of patients with rare complications.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Biomedical Engineering
Background:
- Intracorneal ring segments (ICRS) are an intrastromal additive technique.
- Initially developed for myopia, ICRs are now widely used for keratoconus and post-LASIK ectasia.
- ICRS serve as an alternative to corneal transplantation for patients with rigid contact lens intolerance.
Purpose of the Study:
- To summarize the management of irregular astigmatism using intracorneal ring segments.
- To elucidate the mechanism of action and evolving implantation strategies for ICRs.
- To review the efficacy, safety, and potential combination therapies involving ICRs.
Main Methods:
- Review of the intrastromal additive technique using intracorneal ring segments.
- Discussion of femtosecond laser application for surgical ease.
- Emphasis on individualized implantation strategies based on patient topography and tomography.
Main Results:
- ICRS induce biomechanical changes, centering and flattening the cornea.
- Over 70% of patients experience improvements in refraction and vision.
- Complications associated with ICR implantation are rare.
Conclusions:
- Intracorneal ring segments are an effective treatment for irregular astigmatism.
- The technique offers a viable alternative to corneal transplantation.
- ICRS can be combined with keratoplasty to optimize visual outcomes.
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