Topographic Stability After Hyperopic LASIK
- 1 August 2010
- journal article
- Published by SLACK, Inc. in Journal of Refractive Surgery
- Vol. 26 (8), 547-554
- https://doi.org/10.3928/1081597x-20100225-01
Abstract
Purpose: To analyze and compare time-dependent topographic changes after hyperopic LASIK. Methods: Sixty-six consecutive eyes of 37 patients treated for hyperopic astigmatism with the SCHWIND ESIRIS excimer laser with follow-up of ≥3 months were retrospectively evaluated. In all cases, standard examinations and 3-, 12-, and 36-month topographic analyses with a Keratron topographer (Optikon 2000 SpA) were performed. Topographic changes in Maloney index, simulated keratometry (sim K), and keratometry (K) readings at 3, 5, and 7 mm were evaluated. Results: Postoperatively, 92% of eyes were within ±0.50 diopters (D) manifest refraction after 3-month follow-up, compared with 83% after 12 months, and 72% after 36 months. No significant regression between the 3-month and 1-year follow-up as well as 1 to 3 years postoperatively was noted. Evaluation of mean regression (increasing hyperopia) between 3 and 36 months postoperatively resulted in a Maloney index of 0.016 D/month, regression of 0.013 D/month for the sim K readings, and regression of 0.010 D/month, <0.001 D/month, and 0.004 D/month for the 3-, 5-, and 7-mm zones, respectively. Refractive stability was comparable to the Maloney index and sim K index stability. Conclusions: Topography can be used as an objective method to analyze regression after treatment of hyperopia. This method allows differentiation as to whether there is regression, topographic change, or latent hyperopia, which becomes manifest after a certain time period. Following hyperopic LASIK with the SCHWIND ESIRIS laser, no topographic regression between 3- and 36-month follow-up could be observed.Keywords
This publication has 40 references indexed in Scilit:
- LASIK for Myopia With Aspheric “Aberration Neutral” Ablations Using the ESIRIS Laser SystemJournal of Refractive Surgery, 2009
- Increased hyperopia with ageing based on cycloplegic refractions in adults: the Tehran Eye StudyBritish Journal of Ophthalmology, 2009
- Experimental evaluation of optimized ablation patterns for laser refractive surgeryOptics Express, 2009
- Analysis of optimized profiles for ‘aberration‐free’ refractive surgeryOphthalmic and Physiological Optics, 2009
- Postsurgery corneal asphericity and spherical aberration due to ablation efficiency reduction and corneal remodelling in refractive surgeriesEye, 2008
- Long-term follow-up of hyperopic laser in situ keratomileusis correction using the Star S2 excimer laserJournal of Cataract & Refractive Surgery, 2008
- Photorefractive keratectomy with aspheric profile of ablation versus conventional photorefractive keratectomy for myopia correctionJournal of Cataract & Refractive Surgery, 2006
- Excimer laser photorefractive keratectomy for hyperopia: 7.5-year follow-upJournal of Cataract & Refractive Surgery, 2005
- 5-year follow-up of LASIK for hyperopiaOphthalmology, 2005
- Wavefront-optimized ablation profilesJournal of Cataract & Refractive Surgery, 2004