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- W2168366122 abstract "Purpose: To evaluate the long-term stability, complications, and causative factors in eyes that had photorefractive keratectomy (PRK) for myopia. Setting: Kangnam St. Mary’s Hospital, Seoul, Korea. Methods: This study evaluated the results of PRK in 201 myopic eyes with a consecutive 5 year follow-up. Preoperative myopia ranged from 2.25 to 12.50 diopters (D), with astigmatism of less than 1.50 D. The excimer laser was set to a maximum correction of −6.50 D at a 5.0 mm diameter ablation zone. Patients with more than 7.00 D of myopia had double-pass PRK with two different ablation zone sizes (5.0 and 4.5 mm). The data were statistically analyzed using polynomial regression for evaluating long-term stability and myopic regression and Cox’s proportional hazard model for evaluating causative factors. Results: An uncorrected visual acuity better than 20/25 was achieved in 62.4% of eyes. The main complication after PRK was myopic regression. Mean refractive error 5 years after PRK was −2.43 ± 1.90 D. It was −1.49 ± 0.60 D in moderately myopic eyes (less than 6.50 D) and −3.55 ± 2.31 D in highly myopic eyes (over 7.00 D). According to our evaluation, the possible causative factors for myopic regression were pre-PRK refraction (P < .0001) and post-PRK corneal haze (P = .01); their relative risks were 3.33 and 1.93, respectively. Multivariate analysis eliminated the corneal haze factor. Conclusion: Myopic regression occurred as long as 5 years after PRK, with the most important factor for myopic regression being pre-PRK refraction." @default.
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- W2168366122 date "1997-06-01" @default.
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- W2168366122 title "Five year results of photorefractive keratectomy for myopia" @default.
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- W2168366122 doi "https://doi.org/10.1016/s0886-3350(97)80282-9" @default.
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