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Visual performance after excimer laser photorefractive keratectomy for high myopia

PURPOSE: To evaluate the efficacy, safety, predictability, and visual performance of excimer laser photorefractive keratectomy (PRK) for myopia greater than −8 diopters (D). METHODS: Fifty-four patients (104 eyes) with myopia from −8D to −13D and cylinder up to −4D received surface ablation techniqu...

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Detalles Bibliográficos
Autores principales: Liu, Yu-Ling, Tseng, Chien-Chi, Lin, Chang-Ping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5602153/
https://www.ncbi.nlm.nih.gov/pubmed/29018762
http://dx.doi.org/10.4103/tjo.tjo_6_17
Descripción
Sumario:PURPOSE: To evaluate the efficacy, safety, predictability, and visual performance of excimer laser photorefractive keratectomy (PRK) for myopia greater than −8 diopters (D). METHODS: Fifty-four patients (104 eyes) with myopia from −8D to −13D and cylinder up to −4D received surface ablation technique with the Allegretto wave version 1009-1 excimer laser to correct their refractive error. The patients were examined on days 1, 3, 7, and 14 and 1, 3, 6, and 12 months postoperatively. Visual acuity, manifest refraction, corneal haze, topography, intraocular pressure, contrast sensitivity, and wavefront aberration were evaluated. RESULTS: Twelve months postoperatively, 95% of eyes were within 1D of the intended correction. In addition, 94% of eyes had attained uncorrected distance visual acuity of 20/25 or better, and 98% of eyes had improved or remained their corrected distance visual acuity. All eyes exhibited barely detectable corneal haze which peaked during the 1(st) month with a gradual reduction in the 3(rd) month. Ninety-five percent of patients had no or only mild degree of night glare. CONCLUSIONS: Excimer laser PRK is an effective and predictive treatment for high myopia greater than −8D with or without astigmatism up to −4D. The incidence of complication is low. All patients who are candidates for laser in situ keratomileusis can be candidates for surface ablation, especially those with preoperative thinner cornea or higher risk of corneal flap complications.