Title: Efficacy of excimer laser photorefractive keratectomy in treatment of 115 cases with myopia:7 year follow up
Abstract: Objective To evaluate the clini cal efficacy of excimer la ser photorefractive keratectomy (PRK) in treatment of myopia of different degree . Methods An excimer laser machine (NIDEK, type EC-5000, made in Japan) was used to do PRK for treatment of myopia (115 cases, 208 eyes). Before operati on, all the patients were divided into three groups according to the diopter (sp herical equivalent): group A (-0.5~-6.00D, 162 eyes), group B (-6.12~-8.00D, 2 8 eyes) and group C (-8.00D, 18 eyes). 7-year follow-up had been done. Results In groups A, B and C, the rates of uncorrected v isual acuity ≥1.0 were 99.38%, 85.71%, and 16.67%, respectively; ≥0.5 were 99. 38%, 96.43% and 38.89%, res pectively; the diopter within ±1.00D were 96.30%, 82.14% and 27.78%, respective ly. The curative rates in groups A and B were higher than that in group C (all P 0.01). Conclusion PRK is a safe, effective, pr edictable and stable procedure to correct lower and moderate myopia (-8.00D). But predictability an d stability is not so good in high and extra-high myopia (-8.00D) for high rate of refractive regression and respond of Haze.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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