+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Prospective evaluation of night vision goggle and night firing performance in soldiers treated with lasik and prk



Prospective evaluation of night vision goggle and night firing performance in soldiers treated with lasik and prk



ARVO Annual Meeting Abstract Search & Program Planner : Abstract No 2634



Purpose Excimer laser surgery (LASIK and PRK) has proven effective for correction of refractive error, and holds great promise for widespread application in military environments. While service members typically achieve normal post-operative visual acuity and satisfy military retention standards, less is known about performance in operational settings, particularly at night. Our purpose is to conduct a prospective evaluation of night vision goggle (NVG) and night firing performance in soldiers treated with LASIK and PRK. We report initial (1-month) findings in nine soldiers. Methods 9 subjects underwent surgery for naturally occurring myopia or myopic astigmatism using the ALCON LADARVision laser system. Night Firing Range performance with the M-16A2 was measured preoperatively and at 1 month after surgery under the following conditions (corrected and uncorrected): 1) NVG and aiming light under simulated starlight, and 2) iron sight under low light (simulated dusk). Targets were scored using a standard system. Before and after surgery scores were compared for the iron sight and NVG sight. Results A comparison of post-operative performance without correction to pre-operative performance with correction is the most relevant for military operations. In nine subjects tested thus far, 1-month post-operative night firing score (without optical correction) was not significantly different from pre-operative performance with best correction for either the iron sight or NVGs (p>0.4). Interestingly, mean post-operative firing with NVGs (but without optical correction), was slightly higher than mean pre-operative NVG firing performance (with best correction), and this difference approached significance (p=0.08). Conclusions Despite reports of reduced night vision following laser refractive surgery, performance of one important military task, firing a weapon in low light setting, improved in this study. Initial results indicate that, by 1-month after surgery night firing performance without optical correction is equal to or slightly better than pre-operative performance with best correction. The trend toward improved post-operative firing performance with NVGs may reflect the lack of intervening spectacle correction between NVG and observer, which can impede performance by increasing reflections, distortion, and weight. The finding of enhanced performance through NVGs is consistent with our previous study of NVG visual acuity (Bauer at al, ARVO 2001 Abstract 3266).

(PDF emailed within 1 workday: $29.90)

Accession: 035573614

Download citation: RISBibTeXText


Related references

Evaluation of integrated night vision goggle (NVG) helmets under sustained +Gz. Aviation, Space, and Environmental Medicine 66(2): 118-125, 1995

PAVE LOW III: interior lighting reconfiguration for night lighting and night vision goggle compatibility. Aviation, Space, and Environmental Medicine 53(12): 1162-1165, 1982

Laboratory assessment of the AN/PVS-5 night vision goggle. Aviation, Space, and Environmental Medicine 46(11): 1390-1394, 1975

Chromatic aftereffects associated with a night vision goggle simulation. Aviation, Space, and Environmental Medicine 59(2): 125-128, 1988

Design of three-element night-vision goggle objectives. Applied Optics 37(4): 622-626, 2008

Prevention of facial fractures from night vision goggle impact. Biomedical Sciences Instrumentation 42: 13-18, 2006

Simulated night vision goggle wear and colored aftereffects. Aviation, Space, and Environmental Medicine 84(3): 206-211, 2013

Measurement of night vision goggle visual acuity with the NVG resolution chart. Aviation Space & Environmental Medicine 65(9 SECT 1): 846-850, 1994

Human factors aspects of night vision goggle nvg helicopter accidents. Aviation Space & Environmental Medicine 61(5): 508, 1990

Measurement of night vision goggle (NVG) visual acuity with the NVG resolution chart. Aviation, Space, and Environmental Medicine 65(9): 846-850, 1994

Cytochrome oxidase changes in trapezius muscles with night vision goggle usage. International Journal of Industrial Ergonomics 40(2): 140-145, 2010

Night vision goggle (NVG) visual acuity under ideal conditions with various adjustment procedures. Aviation, Space, and Environmental Medicine 65(8): 705-709, 1994

Night vision goggle visual acuity under ideal conditions with various adjustment procedures. Aviation Space & Environmental Medicine 65(8): 705-709, 1994

Field of view versus resolution trade-off for night vision goggle simulators. Investigative Ophthalmology & Visual Science 37(3): S517, 1996

Design of refractive/diffractive objective for head-mounted night vision goggle. Optik - International Journal for Light and Electron Optics 115(1): 7-10, 2004