Excimer laser photorefractive keratectomy for low to moderate myopia using a 5.0 mm treatment zone and no transitional zone: 16-year follow-up.
| Autor: | Guerin MB; Refractive Laser Suite, Mater Private Hospital, Dublin, Ireland., Darcy F, O'Connor J, O'Keeffe M |
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| Jazyk: | angličtina |
| Zdroj: | Journal of cataract and refractive surgery [J Cataract Refract Surg] 2012 Jul; Vol. 38 (7), pp. 1246-50. |
| DOI: | 10.1016/j.jcrs.2012.03.027 |
| Abstrakt: | Purpose: To evaluate the safety and efficacy of photorefractive keratectomy (PRK) 16 years postoperatively. Setting: Refractive Laser Suite, Mater Private Hospital, Dublin, Ireland. Design: Cohort study. Methods: Myopic PRK was performed using the UV200 excimer laser with a 5.0 mm ablation zone. The following were evaluated in patients returning 16 years postoperatively: refractive stability, refractive predictability, corrected visual acuity, corneal haze, and subjective patient symptoms (eg, glare, halos). Results: Most of the 120 eyes (80 patients) were followed for 2 years or more; 23 patients (39 eyes) were followed for 16 years. Preoperatively, the spherical equivalent (SE) ranged from -1.75 to -7.25 diopters (D) and astigmatism from 0.00 to 1.50 D. At 2 years, the mean SE was -0.25 D and at 16 years, -0.58 D. Overall, 31 eyes (79.5%) were within ± 1.00 D of emmetropia, with 6 eyes (15.4%) between 1.00 D and 2.00 D and 2 eyes (5.1%) between 2.00 D and 3.00 D. The final uncorrected distance visual acuity was 20/20 or better in 27 eyes (69.2%) and 20/30 or better in 36 eyes (92.3%). Eight eyes (20.5%) lost 1 line of corrected distance visual acuity. Four eyes (10.3%) had visible haze and 7 eyes (17.9%) had hemosiderin. All patients stated they would have the procedure again. Conclusion: Photorefractive keratectomy was safe and effective in the treatment of myopia up to -7.00 D, and all patients reported being satisfied. There appeared to be slight regression over the follow-up period. Financial Disclosure: No author has a financial or proprietary interest in any material or method mentioned. (Copyright © 2012 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.) |
| Databáze: | MEDLINE |
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