PRK and LASIK in Patients with Myopia Ranging from –6,00 to – 9,00 D

Overview

Objective:
Observing of effectiveness, safety and short-term stability of patientswith myopia ranging from – 6,0 to – 9,0 diopters (D) after surgery and theircomparison.Participants and method: We were retrospectively analyzing pre- and postopera-tive outcomes of patients with myopia ranging from – 6,0 to – 9,0 D. 90 eyes wereexamined before laser in situ keratomileusis (LASIK) with mean spherical equi-valent refraction – 7,64 ± 0,84 D and mean cylinder – 1,23 ± 1,1 D. 56 eyes wereexamined before photorefractive keratectomy (PRK) with mean spherical equi-valent refraction – 6,92 ± 0,72 D and mean cylinder – 0,60 ± 0,55 D. Patients wereexamined before operation, one week, one month, three months, six months, ninemonths and one year after operation. Data were collected and analyzed by thecomputer programme.Results: We observed the patients who underwent the operation and six monthsafter surgery we received following results : After PRK mean spherical equivalentrefraction was – 0,23 ± 1,24 D, mean cylinder – 0,83 ± 0,42 D, uncorrected visualacuity (UCVA) 0,86 ± 0,35, best spectacle-corrected visual acuity (BCVA) 1,13 ±0,33. After LASIK mean spherical equivalent refraction was – 0,29 ± 1,19 D, meancylinder – 1,14 ± 0,77 D, UCVA 0,65 ± 0,25, BCVA 0,83 ± 0,25. One year after PRK mean spherical equivalent refraction was – 0,44 ± 1,26 D, mean cylinder – 0,80 ±0,57 D, UCVA 0,81 ± 0,31, BCVA 0,97 ± 0,21. After LASIK mean spherical equivalentrefraction was – 0,14 ± 0,86 D, mean cylinder – 1,26 ± 0,89 D, UCVA 0,75 ± 0,25, BCVA0,89 ± 0,20.Conclusions : Both methods are effective and their results after 3 to 6 months afterlaser treatment in patients with myopia ranging from – 6,0 to – 9,0 D werecomparable. Based on the complex evaluation, we prefer LASIK nowadays.

Key words:
moderate and high myopia, photorefractive keratectomy ( PRK ), laserin situ keratomileusis ( LASIK)