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Year : 2020  |  Volume : 33  |  Issue : 2  |  Page : 623-629

Conventional photorefractive keratectomy vs laser in-situ keratomileusis regarding regression in low myopia at 6-month follow-up

Department of Ophthalmology, Faculty of Medicine, Menoufia University, Menoufia, Egypt

Correspondence Address:
Eman M. Abd-Allah El-Asser
Shebin El Kom, Menoufia
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/mmj.mmj_345_19

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Objective The aim was to compare between laser-assisted in-situ keratomileusis (LASIK) and conventional photorefractive keratectomy (PRK) regarding postoperative myopic regression after 6 months. Background Myopia is a condition in which the refractive power of the eye is greater than required. The most frequent complaint of people with myopia is blurred distance vision, which can be eliminated by refractive surgery procedures such as PRK and LASIK. Materials and methods A prospective comparative case series study was conducted on 50 patients with mild to moderate myopia with or without astigmatism, who were divided into two groups: group A included 25 patients operated with PRK and group B included 25 patients operated with LASIK. Follow-up was done by slit lamp and assessment of uncorrected distance visual acuity, manifest refraction, and best spectacle corrected distance visual acuity at 1 week, 1 month, 3 months, and 6 months. Results Mean uncorrected visual acuity after 1 week was 0.60 ± 0.11 for the PRK group and 0.84 ± 0.12 for the LASIK group (P < 0.001). Mean uncorrected visual acuity after 1 month was 0.98 ± 0.13 for the PRK group and 0.89 ± 0.13 for the LASIK group (P < 0.002). Mean uncorrected visual acuity after 6 months was 1.07 ± 0.12 for the PRK group and 0.90 ± 0.12 for the LASIK group (P < 0.001). Mean spherical equivalent after 6 months was −0.32 ± 0.22 D for the PRK group and −0.05 ± 0.52 D for the LASIK group (P < 0.024). Conclusion Uncorrected visual acuity 1 week after surgery is significantly better in eyes undergoing LASIK than in eyes undergoing PRK. Both procedures provide functional vision by 1 week after surgery. No refractive regression was noted after 6 months of follow-up.

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