DEC 27, 2013
Refractive Mgmt/Intervention
This retrospective case review found that the Visumax 500 kHz femtosecond platform for LASIK has comparable safety, predictability and efficacy profile to the Intralase 60 kHz femtosecond laser system.
The authors believe there have been no direct studies comparing refractive outcomes between these two laser systems.
They reviewed the charts of 381 patients who underwent LASIK with a flap created using the Visumax 500 kHz laser and 362 patients who had the flap created with the Intralase 60 kHz at the same center in Singapore. Ablation was performed with the Wavelight Allegretto Eye-Q 400 Hz excimer laser in all patients.
Three months postoperatively, UDVA was 20/40 or better in 99.1 percent of eyes in the Intralase 60 kHz laser group and 99.4 percent of eyes in the Visumax 500 kHz laser group (P = 0.678). Regarding predictability, 98.6 percent of eyes and 97.4 percent of eyes, respectively, were within ±1.0 diopter of the attempted spherical equivalent correction postoperatively (P = 0.228). The safety index was similar in the two groups (mean 1.06 in the 60 kHz group versus 1.05 in the 500 kHz; P = 0.321).
The authors also found that the results were similar when eyes were divided into subgroups of low, moderate and high myopia.