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Laser in situ keratomileusis to correct post-keratoplasty astigmatism; 1-step versus 2-step procedure.

AbstractPURPOSE:
To investigate the correction of post-penetrating keratoplasty (PKP) astigmatism using laser in situ keratomileusis (LASIK). Visual and refractive outcomes were evaluated after LASIK was performed in 1 step (lamellar cut and ablation in 1 procedure) or 2 steps (lamellar cut then ablation in 2 successive procedures).
SETTING:
Department of Cornea and Refractive Surgery, Vissum-Instituto Oftalmológico de Alicante, University of Miguel Hernández, Alicante, Spain.
METHODS:
In this prospective observational study, 22 consecutive eyes were divided into 2 groups depending on the LASIK procedure performed to correct post-PKP astigmatism. Group 1 (1-step LASIK) included 11 eyes and Group 2 (2-step LASIK), 11 eyes. The patients were followed for 6 months.
RESULTS:
A statistically significant improvement was obtained in Group 2 with a mean vector analysis result of the cylinder of -4.37 diopters (D) +/- 1.79 (SD) (P = .018). In Group 1, the mean astigmatism correction was 2.38 +/- 1.71 D. The number of reoperations and residual refractive defects were significantly better in Group 2.
CONCLUSION:
The 2-step technique improved the accuracy of excimer laser correction of post-PKP astigmatism.
AuthorsJorge L Alió, Jaime Javaloy, Amr A Osman, Virgilio Galvis, Alejandro Tello, Hazem E Haroun
JournalJournal of cataract and refractive surgery (J Cataract Refract Surg) Vol. 30 Issue 11 Pg. 2303-10 (Nov 2004) ISSN: 0886-3350 [Print] United States
PMID15519079 (Publication Type: Journal Article, Multicenter Study, Research Support, Non-U.S. Gov't)
Topics
  • Adolescent
  • Adult
  • Aged
  • Astigmatism (etiology, surgery)
  • Corneal Topography
  • Female
  • Graft Survival
  • Humans
  • Keratomileusis, Laser In Situ (methods)
  • Keratoplasty, Penetrating (adverse effects)
  • Male
  • Middle Aged
  • Postoperative Complications
  • Prospective Studies
  • Refraction, Ocular (physiology)
  • Safety
  • Treatment Outcome
  • Visual Acuity (physiology)

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