Safety and Efficacy of LASIK and PRK in a Large Corporate Practice
Purpose
To evaluate the safety and efficacy of LASIK and PRK in a large, multi-center, multi-surgeon practice.
Methods
Retrospective review of 77,018 consecutive eyes with 3 month follow-up which underwent LASIK or PRK between 5/2013 and 4/2014 at 52 corporate centers. All flaps were created by a femtosecond laser; all excimer ablations were by either the Alcon Wavelight Eye Q 400 wavefront optimized (WFO) or the AMO VISX Star S4 CustomVue wavefront guided (WFG) laser. Postop uncorrected distance acuity (UDVA), pre and post op corrected distance acuity (CDVA), and preop and postop manifest spherical equivalent (SE) were examined. Statistical analyses within this cohort of 77,018 eyes were performed.
Results
Overall, 20/20 UCDA was achieved in 84% of LASIK eyes; myopes 88 %, hyperopes 55 %, p<0.0001. UCDA was ≥ preop CDVA in 83% of eyes, 18% gained ≥ 1 line CDVA, 4% lost ≥ 1 line CDVA. Mean UCDA (logmar) post myopic LASIK, was 0 ±0.14, post myopic prk-0.02 ±0.13. UCDA post WFG myopic LASIK was 0.01 ±0.11, post WFO myopic LASIK 0 ±0.15, p=0.06. UCDA post hyperopic LASIK was -0.16 ±0.25, post hyperopic PRK -0.18 ±0.26. UCDA post LASIK for hyperopia <3 D SE was 0.16 ±0.26, for hyperopia >3D SE, 0.1 ±0.15, p= 0.73.
Conclusion
LASIK and PRK performed in a large corporate practice are safe and effective. Results of myopic procedures are significantly better than for hyperopic procedures. LASIK versus PRK results and WFG versus WFO results are not clinically significantly different.