Refractive and Visual Outcomes of Laser in Situ Kerato Mileusis for Moderate to High Myopia Using 213nm Solid State Laser - A Four Year Follow Up Study

Abstract

Aims: To evaluate and report the visual, refractive outcomes and corneal integrity of conventional LASIK performed using 213nm solid laser to correct moderate to high myopia. Design: Prospective case series Methods: Present study analysed 53 eyes of 28 patients, with moderate to high myopia, who underwent conventional LASIK using PULZAR Z1 SOLID LASER, long term (4 year) visual refractive outcomes and the corneal integrity were studied. The patients were followed up for minimum of 48 months. Results: There was a significant improvement in uncorrected distant visual acuity, post operatively (P value < 0.01). No significant change was detected in decimal notations in CDVA pre and post op (p=0.383). At the end of fourth year, post op logMAR UDVA was 0.30(20/40 or 0.50 decimal notation) in 87% of eyes and 85% of eyes achieved 0.18 logMAR (20/30 or 0.67 decimal notation). The post op logMAR CDVA 0.48(0.33 in decimal notation) was 100%, where as logMAR UDVA 0.48(0.33 in decimal notation) was 92%. The efficacy index was 1.11 and safety index was 1.19. In the long run, no serious complications pertaining to corneal integrity were noticed and 4% of eyes had complaints of haloes and night vision problems. Conclusion: LASIK using PULZAR Z1 solid state laser, proved safe and effective providing predictable correction of moderate to high myopia.

Keywords

• corrected distance visual acuity
• uncorrected distance visual acuity
• logmar
• rsbt
• prk and bcva