Comparison of IOL Power Calculation and Refractive Outcome After Laser Refractive Cataract Surgery With a Femtosecond Laser Versus Conventional Phacoemulsification
- 1 August 2012
- journal article
- Published by SLACK, Inc. in Journal of Refractive Surgery
- Vol. 28 (8), 540-544
- https://doi.org/10.3928/1081597x-20120703-04
Abstract
PURPOSE: To compare intraocular lens (IOL) power calculation and refractive outcome between patients who underwent laser refractive cataract surgery with a femtosecond laser and those with conventional cataract surgery. METHODS: In this prospective study, 77 eyes from 77 patients underwent laser refractive cataract surgery (laser group; Alcon LenSx femtosecond laser), and conventional cataract surgery with phacoemulsification was performed in 57 eyes from 57 patients (conventional group). Biometry was done with optical low coherence reflectometry (Lenstar LS900, Haag-Streit AG), and IOL calculation was performed with third-generation IOL formulas (SRK/T, Hoffer Q, and Holladay). The refractive outcome was analyzed using the mean absolute error (MAE; difference between predicted and achieved postoperative spherical equivalent refraction), and multivariable regression analysis was performed to compare the two groups. RESULTS: No significant differences were found between age, axial length, keratometry, and preoperative corrected visual acuity in the laser and conventional groups ( P >.05; Mann-Whitney U test). At least 6 weeks after surgery, MAE was significantly lower in the laser group (0.38±0.28 diopters [D]) than in the conventional group (0.50±0.38 D) ( P =.04). The difference was the greatest in short (axial length 26.0 mm, 0.33±0.24 vs 0.63±0.42) eyes. CONCLUSIONS: Laser refractive cataract surgery with a femtosecond laser resulted in a significantly better predictability of IOL power calculation than conventional phacoemulsification surgery. This difference is possibly due to a more precise capsulorrhexis, resulting in a more stable IOL position.Keywords
This publication has 23 references indexed in Scilit:
- Femtosecond Laser Capsulotomy and Manual Continuous Curvilinear Capsulorrhexis Parameters and Their Effects on Intraocular Lens CentrationJournal of Refractive Surgery, 2011
- Comparison of Intraocular Lens Decentration Parameters After Femtosecond and Manual CapsulotomiesJournal of Refractive Surgery, 2011
- Formula choice: Hoffer Q, Holladay 1, or SRK/T and refractive outcomes in 8108 eyes after cataract surgery with biometry by partial coherence interferometryJournal of Cataract & Refractive Surgery, 2011
- Initial Clinical Evaluation of an Intraocular Femtosecond Laser in Cataract SurgeryJournal of Refractive Surgery, 2009
- Effect of decentration and tilt on the image quality of aspheric intraocular lens designs in a model eyeJournal of Cataract & Refractive Surgery, 2009
- Sources of error in intraocular lens power calculationJournal of Cataract & Refractive Surgery, 2008
- First safety study of femtosecond laser photodisruption in animal lenses: Tissue morphology and cataractogenesisJournal of Cataract & Refractive Surgery, 2005
- National Biometry Audit IIEye, 2005
- Tilt and decentration of bag-fixated intraocular lenses: A comparative study between capsulorhexis and envelope techniquesDocumenta Ophthalmologica, 1994
- A new look at the statistical model identificationIEEE Transactions on Automatic Control, 1974