Visual outcome and contrast sensitivity after photorefractive keratectomy in low to moderate myopia: Wavefront-optimized versus conventional methods
- 19 August 2011
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Journal of Cataract & Refractive Surgery
- Vol. 37 (10), 1858-1864
- https://doi.org/10.1016/j.jcrs.2011.05.023
Abstract
To compare visual outcomes and contrast sensitivity after wavefront-optimized or conventional photorefractive keratectomy (PRK) in myopic patients with or without astigmatism. Vanak Eye Surgery Center, Tehran, Iran. Comparative case series. Patients with low to moderate myopia with or without astigmatism were allocated into 2 groups. The study group was treated with wavefront-optimized PRK (Allegretto Wave Eye-Q software version 2.020 default treatment) and the control group, with conventional PRK (Technolas 217z). In all cases, treatments were bilateral and performed with the same device. Baseline and 3-month postoperative measures were uncorrected and corrected distance visual acuities, manifest refraction, and contrast sensitivity. Each group comprised 66 eyes. The mean preoperative spherical equivalent refraction improved from −2.99 diopters (D) ± 1.02 (SD) preoperatively to −0.08 ± 0.26 D 3 months postoperatively in the study group and from −2.66 ± 0.95 D to 0.01 ± 0.30 D, respectively, in the control group. In both groups, the postoperative mesopic and photopic contrast sensitivity decreased significantly at most spatial frequencies. The postoperative decrease in contrast sensitivity in both groups was comparable except at spatial frequencies of 3 cycles per degree (cpd) under mesopic conditions and 12 cpd under photopic conditions, frequencies at which the control group had a greater reduction. Visual acuity and refractive error outcomes were similar in both treatment groups. After 3 months, mesopic and photopic contrast sensitivity were significantly decreased in both groups; the reduction in the 2 groups was almost comparable. No author has a financial or proprietary interest in any material or method mentioned.Keywords
This publication has 12 references indexed in Scilit:
- Comparison of postoperative higher-order aberrations and contrast sensitivity: Tissue-saving versus conventional photorefractive keratectomy for low to moderate myopiaJournal of Cataract & Refractive Surgery, 2010
- Transitioning to Optimized Correction with the WaveLight ALLEGRETTO WAVE: Case Distribution, Visual Outcomes, and Wavefront AberrationsJournal of Refractive Surgery, 2010
- Comparing Conventional and Wavefront-optimized LASIK for the Treatment of HyperopiaJournal of Refractive Surgery, 2010
- Conventional versus custom ablation in photorefractive keratectomy: Randomized clinical trialJournal of Cataract & Refractive Surgery, 2010
- Refractive Surgery Trends and Practice Style Changes in Germany Over a 3-year PeriodJournal of Refractive Surgery, 2010
- Wavefront Optimized Versus Custom-Q Treatments in Surface Ablation for Myopic Astigmatism With the WaveLight ALLEGRETTO LaserJournal of Refractive Surgery, 2008
- Improved contrast sensitivity and visual acuity after wavefront-guided laser in situ keratomileusis: In-depth statistical analysisJournal of Cataract & Refractive Surgery, 2006
- A Prospective Randomized Clinical Trial of Laser In Situ Keratomileusis With Two Different LasersAmerican Journal of Ophthalmology, 2005
- Ocular Higher-Order Aberrations and Contrast Sensitivity after Conventional Laser In Situ KeratomileusisInvestigative Ophthalmology & Visual Science, 2004
- Laser in situ keratomileusis for myopia and the contrast sensitivity functionJournal of Cataract & Refractive Surgery, 2004