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Bruce Rivers, Rose Kristine Sia, Denise S. Ryan, Lamarr Peppers, Jennifer B. Eaddy, Lorie Logan, Richard D. Stutzman, Joseph Pasternak; Visual Performance with Night Vision Goggles following Wavefront-guided and wavefront-optimized refractive surgery. Invest. Ophthalmol. Vis. Sci. 2016;57(12):4870. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To assess visual performance with night vision goggles (NVG) among U.S. military servicemembers before and after wavefront-guided (WFG) and wavefront-optimized (WFO) photorefractive keratectomy (PRK) and LASIK.
A total of 52 active duty U.S. military servicemembers with myopia or myopic astigmatism electing to undergo PRK or LASIK were randomized to undergo either WFG (VISX CustomVue STAR S4 IR) or WFO treatment (Wavelight Allegretto Wave EyeQ excimer laser system). Best-corrected low contrast visual acuity (LCVA) of the aiming eye was assessed pre- and postoperatively using a 25% contrast chart viewed through a NVG filter. Firing performance with a NVG and aiming light was evaluated preoperatively with optical correction and postoperatively without correction. A M16-A4 rifle was fired on a modified range with a 25-meter distance standardized target. Visual performance was compared among groups using a repeated measures analysis of variance. Associations between postoperative firing scores and LCVA with NVG, residual refractive error and type of surgery were determined using a regression analysis.
The study participants (mean age 30.0 ±6.7 years and refractive error -3.77 ±1.40 diopters) underwent one of the following procedures: WFG PRK (n=12), WFG LASIK (n=13), WFO PRK (n=13) or WFO LASIK (n=14). At 6 months postoperatively, there were no significant differences in the LCVA with NVG or in firing scores among the groups (Table 1). Postoperative firing scores were not significantly associated with postoperative LCVA, residual refractive error or the type of surgery received (R2=0.09, p=0.63).
Myopic correction with PRK or LASIK using either WFG or WFO treatment was safe and effective in terms of visual performance with NVG under low light conditions. Independent of the type of surgery, there was no significant loss of visual acuity or firing performance under a visually degraded condition.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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