[Laser refractive surgery for moderate or high myopic astigmatism--1 year outcome]

Abstract

Purpose: To evaluate the medium term postoperative clinical outcomes in eyes with medium and high myopic astigmatism that had excimer laser refractive surgery (LASIK and PRK).

Setting: Oftaprof Clinic, Iasi.

Material and methods: This prospective interventional study comprised 74 eyes with myopic astigmatism 2D who had excimer laser refractive surgery. Aspheric treatments with a wavefront-optimized ablation profile were performed using the Wavelight Allegretto Eye-Q excimer laser system. The follow-up period was 12 months.

Results: Uncorrected distance visual acuity(UD VA) improved from 0,08 +/- 0,09 (SD) to 0,74 +/- 0,16 (SD) 3 months postoperatively and maintained at 0,75 +/- 0,16 (SD) 12 months postoperatively; all eyes achieved UDVA 0,5 or better and 71% of them achieved UDVA 1 or better 12 months postoperatively. REFRACTIVE RESULTS: The mean cylinder and the mean spheric equivalent have significantly decreased after laser refractive surgery (p=0,001); 98% of eyes were within +/- 1D of the attempted astigmatic correction, and 76% were within +/- 0,5D. Only one eye lost one line of corrected distance visual acuity (CDVA), 14 eyes gained one line of CDVA and 6 eyes gained 2 or more lines of CDVA. Intraoperative complications were: limbal vessels haemorrhage during flap creation (6 eyes), flap slightly descentered inferiorly (2 eyes). Postoperative complications were: diffuse lamelar keratitis (3 eyes after LASIK) and moderate epithelial haze (4 eyes after PRK).

Conclusions: PRK and LASIK have safety, efficacy and predictibility of correcting moderate to high myopic astigmatism using Wavelight Allegretto Eye-Q excimer laser system.