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Citation |
Reddix MD, Funke ME, Kinney MJ, Bradley JL, Irvin G, Rea EJ, Kunkle CK, McCann MB, Gomez J. Mil. Med. 2019; 184(Suppl 1): 593-603. |
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Affiliation |
The Henry M. Jackson Foundation for the Advancement of Military Medicine, INC., 6720A Rockledge Drive, Bethesda, MD. |
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Copyright |
(Copyright © 2019, Association of Military Surgeons of the United States) |
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DOI |
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PMID |
30901431 |
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Abstract |
Prototype low-intensity threat laser eye protection (LIT-LEP) spectacles were evaluated for US Coast Guard (USCG) cockpits and night vision goggle compatibility. The impetus for interest in aviation LIT-LEP is driven in part by the fact that easily accessible 0.5-2.0 W high-power laser pointers exceed safety standards for direct on-axis viewing. A repeated-measures experimental design was used to assess LIT-LEP performance relative to a no-LEP control for the following tasks: Near- and far contrast acuity, night vision goggle far-contrast acuity, emissive and non-emissive light source color-vision screening, and USCG multifunctional display color symbol discrimination reaction time and accuracy. Near- and far-contrast acuity results demonstrated good LIT-LEP performance for typical in- and out-of-cockpit lighting conditions. Night vision goggle performance suffered marginally at only one contrast level (85%; 20/30 acuity line). Color vision test results showed good color balance in that S-, M-, and L-cone performance did not demonstrate a clinical diagnostic color defect for emissive or non-emissive light sources when wearing LIT-LEP. Color symbol discrimination reaction-time-task results based on inverse efficiency scores revealed that some non-primary flight display colors exhibited a combination of slower speed and decreased accuracy. The findings will contribute to an acquisition decision as well as guide future LEP designs. Language: en |
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Keywords |
Acuity; Color Vision; Laser Eye Protection; Laser Veiling Glare; Visually-Mediated Performance |