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J. B. Randleman, C. Perez-Straziota, R. Stulting; Visual Outcomes With Wavefront-Guided and Wavefront-Optimized LASIK. Invest. Ophthalmol. Vis. Sci. 2008;49(13):2913.
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© ARVO (1962-2015); The Authors (2016-present)
To compare the outcomes between VISX S4 wavefront-guided and Wavelight Alegretto Wave wavefront-optimized LASIK.
Prospective analysis of 56 eyes that underwent LASIK from June to August 2007, including 28 eyes treated with the VISX STAR S4 wavefront-guided excimer laser (VISX) and 28 age and refraction-matched eyes treated with the Wavelight Allegretto Wave wavefront-optimized excimer laser (Wavelight). Outcomes compared included Uncorrected Visual Acuity (UCVA), best spectacle-corrected visual acuity (BSCVA) and manifest refraction, including sphere, cylinder, and spherical equivalent (SE). The outcomes of the two groups where statistically compared using Student’s t Test with a critic value for α = 0.05.
There where no significant differences between VISX and Wavefront groups for patient age, preoperative sphere, cylinder, SE, or central corneal thickness, or BSCVA preoperatively (p>0.5). Postoperatively, there were no significant differences between VISX or Wavelight groups in terms of UCVA ( 19.1/20 vs. 19.6/20, p = 0.7), BSCVA (19.1/20 vs. 19.8/20, p = 0.8) sphere (-0.04D vs. -0.02D, p = 0.75), or SE (0.04 D vs. 0.01 D, p = 0.7). However, the VISX group had significantly more cylinder postoperatively (0.17 D vs. 0.07 D; p = 0.05).
Visual outcomes were excellent for both groups and there were minimal postoperative differences between the two excimer lasers; however, the VISX group had higher postoperative cylinder than the Wavelight group.
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