|
 |
 |
|
Retrospective Comparison Of Wavelight Allegretto And Technolas Excimer Lasers For Myopic LASIK 1. Daphne Han¹ ¹Singapore National Eye Centre, Singapore, Singapore Objective: To compare the clinical results of LASIK for myopic spheres and spherocylinders using the Wavelight Allegretto Eye-Q versus the Technolas 217z excimer lasers. Method: Retrospective, nonrandomized, comparative, bilateral multisurgeon case series. 446 eyes that underwent myopic LASIK were analyzed, after matching for age and severity of myopia. 223 eyes were treated with the Wavelight Allegretto Eye-Q's wavefront-optimized treatment and Technolas planoscan treatment each. Outcome measures include uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BCVA), manifest refraction, safety, efficacy and refractive predictability. Results: At a mean follow-up of 87 days post-LASIK, mean decimal UCVA was 0.02±0.07 (range -0.12 to 0.30) for Allegretto eyes and 0.02±0.08 (range 09.12 to 0.40) for Technolas eyes (p=0.73). Mean postoperative spherical equivalent was 0.11±0.38 diopters (D) (range -1.25 to 1.50D) for Allegretto and 0.06±0.37D (range -1.25 to 1.13D) for Technolas eyes (p=0.11). Mean safety index was 1.05±0.12 (0.75 to 1.33) for Allegretto eyes and 1.06±0.13 (0.75 to 1.49) for Technolas eyes and mean efficacy index was 0.97±0.13 (0.50 to 1.33) for Allegretto eyes and 0.97±0.16 (0.40 to 1.49) for Technolas eyes. No statistically significant difference was observed between the safety and efficacy indices. 99.3%, 83.7% and 56.0% of Allegretto eyes and 91.3%, 62.2%, and 35.4% of Technolas eyes achieved within ±1.0D, ±0.5D and ±0.25D to target refraction respectively (p<0.05). Conclusion: In this study, although no differences were seen in mean postoperative UCVA, BCVA, safety and efficacy indices between the Allegretto and Technolas excimer lasers, myopic LASIK using the Allegretto provided greater refractive predictability. |
 |