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Xiangjun Chen, Aleksandar Stojanovic, Filip Stojanovic, Tor Paaske Utheim; One- Step Transepithelial Topography- Guided Ablation In Treatment Of Myopic Astigmatism. Invest. Ophthalmol. Vis. Sci. 2012;53(14):1477.
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To evaluate one-step topography-guided transepithelial ablation in the treatment of low to moderate myopic astigmatism using iVIS-Suite, 1KHz excimer laser system.
Retrospective study of 117 consecutive eyes available for evaluation 12 months after surgery. Pre- and postoperative visual and refractive data and postoperative pain and haze were analyzed. A technique integrating custom refractive- and epithelial- ablation in a single uninterrupted procedure was used. Corneal topography was used for custom ablation planning.
The mean preoperative spherical equivalent (SE) and the mean cylinder were: -3.22 diopters (D) ± 1.54 (SD) (range -0.63 to -7.25 D) and -0.77 D ± 0.65 (range 0 to -4.50 D), respectively. At 12 months after surgery: no eyes lost ≥ 2 lines of corrected distant visual acuity (CDVA). Safety and efficacy indexes were 1.27 and 1.09, respectively. Uncorrected distant visual acuity (UDVA) was ≥ 20/20 in 96.6% of the eyes. Manifest refraction spherical equivalent was within ±0.5 D of desired refraction in 93.2% of the eyes. Mean root mean square (RMS) wavefront error measured at central 5 mm increased from 0.20 preoperatively to 0.26 μm postoperatively. Refractive stability was achieved from 1 month after surgery and beyond. No visually significant haze was registered during the observation period. Postoperative pain was reported in 4.5% of patients.
One-step transepithelial topography-guided treatment for low to moderate myopia and astigmatism performed with iVIS Suite laser system, provided safe, effective, predictable and stable results with low pain and no visually significant haze.
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