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Photorefractive keratectomy for myopia and myopic astigmatism correction using the WaveLight Allegretto Wave Eye-Q excimer laser system

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Abstract

To analyze photorefractive keratectomy (PRK) outcomes in myopia and myopic astigmatism correction using the WaveLight Allegretto Wave Eye-Q® excimer laser system (WaveLight Laser Technologie AG, Erlangen, Germany). 222 eyes of 151 patients underwent PRK (mean age 33.5 ± 6.8 years). Pre-operative best spectacle-corrected visual acuity (BSCVA) ranged from 0.4 to −0.1 logMAR (mean −0.03 ± 0.06). Mean spherical equivalent (SE) was −3.29 ± 1.20 D. Efficacy, predictability and safety were evaluated. Minimum follow-up was 3 months. Accountability at 3 and 6 months was 100 and 54 %, respectively (median follow-up 5 months, mean 5.2 ± 2.6 months). At 3 months, mean uncorrected visual acuity (UCVA) was −0.02 ± 0.07 logMAR, BSCVA −0.03 ± 0.05 logMAR, efficacy index 0.98 and safety index 1.02. UCVA was ≥20/16 in 40.1 %, ≥20/20 in 86.5 % and ≥20/25 in 98.2 %. Mean SE was −0.02 ± 0.20 D. Residual refractive error was ± 0.13 D in 81.5 %, ± 0.25 D in 88.7 % and ± 0.50 D in 97.7 %. At 6 months, outcomes were similar: mean UCVA was −0.02 ± 0.07 logMAR, BSCVA −0.03 ± 0.06 logMAR, efficacy index 1.00 and safety index 1.03. UCVA was ≥20/16 in 43.7 %, ≥20/20 in 86.6 % and ≥20/25 in 96.6 %. Mean SE was −0.02 ± 0.17 D. Residual refractive error was ± 0.13 D in 86.6 %, ± 0.25 D in 93.3 % and ± 0.50 D in 98.3 %. Refractive stability was achieved at 3 months. No patient lost more than one line of BSCVA. There were no retreatments. The WaveLight Allegretto Wave Eye-Q is effective, predictable and safe in low-to-moderate myopia and myopic astigmatism PRK correction.

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Authors and Affiliations

  1. Ophthalmology Unit, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075, Coimbra, Portugal

    Esmeralda Costa, Nuno Franqueira, Andreia M. Rosa, Cristina Tavares, Maria J. Quadrado, Conceição Lobo & Joaquim N. Murta

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  1. Esmeralda Costa
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  2. Nuno Franqueira
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Correspondence to Esmeralda Costa.

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Costa, E., Franqueira, N., Rosa, A.M. et al. Photorefractive keratectomy for myopia and myopic astigmatism correction using the WaveLight Allegretto Wave Eye-Q excimer laser system. Int Ophthalmol 34, 477–484 (2014). https://doi.org/10.1007/s10792-013-9833-4

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