Title: Long-term outcomes of excimer laser photorefractive keratectomy for myopia
Abstract: Objective: To evaluate the long term outcome of photorefractive keratectomy (PRK) for myopia with different diopters.Methods: VISX 20/20 was used.Three to five year follow up studies on 258 eyes undergoing PRK were completed. According to the preoperative myopia, the eyes were assigned to two groups:group A,116 eyes ranging from -1.00 to -6.00 D and group B, 142 eyes from -6.25 to -12.00 D (spherical equivalent). Results: 86.2% of the eyes in group A and 54.9% in group B achieved the uncorrected visual acuity of 20/20 or better; 97.4% in group A and 86.6% in group B achieved 10/20 or better after PRK treatment. Residual refraction was ( -0.36±0.40) D in group A and (-0.69±0.66) D in group B. 95.7% of the corneas in group A and 85.9% in group B were clear 3 years postoperatively. Conclusion: PRK is a safe, effective,predictable and stable procedure to correct lower and moderate myopia, but the predictability is not so good in high and extra-high myopic eyes for higher rate of refractive regression. [
Publication Year: 2000
Publication Date: 2000-01-01
Language: en
Type: article
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