June 2013
Volume 54, Issue 15
Free
ARVO Annual Meeting Abstract  |   June 2013
Visual Performance Comparison of Wavefront-optimized and Wavefront-guided Laser in situ keratomileusis (LASIK)
Author Affiliations & Notes
  • Kraig Bower
    Ophthalmology, Wilmer Eye Institute, Lutherville, MD
  • Lamarr Peppers
    US Army Warfighter Refractive Surg Research Ctr, Fort Belvoir Community Hospital, Fort Belvoir, VA
  • Rose Sia
    US Army Warfighter Refractive Surg Research Ctr, Fort Belvoir Community Hospital, Fort Belvoir, VA
  • Richard Stutzman
    Ophthalmology, Walter Reed National Military Medical Center, Bethesda, MD
  • Joseph Pasternak
    Ophthalmology, Walter Reed National Military Medical Center, Bethesda, MD
  • Denise Ryan
    US Army Warfighter Refractive Surg Research Ctr, Fort Belvoir Community Hospital, Fort Belvoir, VA
  • Edward Trudo
    US Army Warfighter Refractive Surg Research Ctr, Fort Belvoir Community Hospital, Fort Belvoir, VA
  • Footnotes
    Commercial Relationships Kraig Bower, None; Lamarr Peppers, None; Rose Sia, None; Richard Stutzman, None; Joseph Pasternak, None; Denise Ryan, None; Edward Trudo, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2013, Vol.54, 3125. doi:
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      Kraig Bower, Lamarr Peppers, Rose Sia, Richard Stutzman, Joseph Pasternak, Denise Ryan, Edward Trudo; Visual Performance Comparison of Wavefront-optimized and Wavefront-guided Laser in situ keratomileusis (LASIK). Invest. Ophthalmol. Vis. Sci. 2013;54(15):3125.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract
 
Purpose
 

To compare visual acuity and contrast sensitivity results after wavefront-guided (WFG) and wavefront-optimized (WFO) LASIK.

 
Methods
 

This was a prospective randomized study that compared visual acuity (VA) and contrast sensitivity (CS) before and after either WFG (n=18) or WFO (n=17) LASIK. Subjects were matched for preoperative refractive error (mean spherical equivalent = -3.28 ±1.33D) and age (31.6 ±8.1 years) WFG surgeries were performed using the VISX Star S4 (Abbott Medical Optics) and WFO surgeries with the Wavelight Allegretto Wave Eye-Q (Alcon Surgical). Corneal flaps were created using the Intralase femtosecond laser system (Abbott Medical Optics). Best corrected VA and small letter (20/25) CS were measured with the Super Vision back-illuminated letter chart (PrecisionVision®; PV) and low luminance, night vision assessed with the PV 25% Low Contrast Chart viewed through a dark green night vision filter. Measurements were obtained at baseline and at 1, 3 and 6 months postoperatively. Repeated measures ANOVA was used to compare WFO vs. WFG LASIK over time.

 
Results
 

There was no significant difference in ablation depth (WFG: 49.9 ±11.9µ; WFO 57.6 ±21.7µ; p=0.20). All subjects retained excellent high contrast VA (20/16) with no difference between WFG and WFO, while CS improved slightly in the WFG group (p<0.05) and was 0.1 log units higher in WFG vs. WFO at 6 months post-op. Night vision performance also improved slightly with time (p<0.05).

 
Conclusions
 

High contrast visual acuity was comparable between WFO and WFG LASIK. WFG LASIK appears to be superior to WFO LASIK in terms of night vision performance and low contrast acuity.

 
 
Table 1. Acuity and Contrast means± SD. P<0.05 is significant. Night Vision (NV) and High Contrast (HC): negative shift equals improvement. Low Contrast (LC): positive shift equals improvement
 
Table 1. Acuity and Contrast means± SD. P<0.05 is significant. Night Vision (NV) and High Contrast (HC): negative shift equals improvement. Low Contrast (LC): positive shift equals improvement
 
Keywords: 683 refractive surgery: LASIK • 679 refractive surgery: comparative studies • 478 contrast sensitivity  
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