Effect of Haze in Advanced Laser Eye Protection Visors on Contrast Acuity

Laboratory tests were conducted to evaluate the effects of haze in FV-6MR and FV-7 advanced laser eye protection (ALEP) visors on vision. Preliminary results from early operational assessment (EOA) flight tests with the FV-6MR (night use) and FV-7 (day use) visors suggested that the current USAF sta...

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Bibliographic Details
Main Authors: Kang, Robert N, LaPage, Connie S, Cora, Steven R
Format: Report
Language:English
Subjects:
ACCEPTABILITY
ACUITY
Anatomy and Physiology
COMPATIBILITY
CONTRAST
DAY
DYES
EOA(EARLY OPERATIONAL ASSESSMENT)
EYE
EYE SAFETY
FILTERS
FLIGHT TESTING
FV-6MR LASER EYE PROTECTION
FV-7 LASER EYE PROTECTION
GLARE
HAZE
HELMETS
LABORATORY TESTS
LASER EYE PROTECTION
LASER SAFETY
LINE OF SIGHT
LOW DENSITY
Medicine and Medical Research
Military Aircraft Operations
MISSIONS
MOUNTS
NIGHT
PE63231F
PROTECTION
REQUIREMENTS
SOURCES
SUN
TARGETS
TEST AND EVALUATION
TRANSMITTANCE
USER NEEDS
VISIBLE SPECTRA
VISION
VISORS
VISUAL ACUITY
VISUAL PERCEPTION
WUAL28300114
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Summary:Laboratory tests were conducted to evaluate the effects of haze in FV-6MR and FV-7 advanced laser eye protection (ALEP) visors on vision. Preliminary results from early operational assessment (EOA) flight tests with the FV-6MR (night use) and FV-7 (day use) visors suggested that the current USAF standards for haze may not adequately predict either the user acceptance or mission compatibility. In addition to the ALEP visors, the standard USAF sun and clear visors were also tested for comparison purposes. A contrast acuity test served as the measure of visual performance. The results suggest that the effects of haze in the ALEP visors on vision were primarily on low contrast targets, decreasing visual acuity. Presence of a glare source, simulating the sun near the line of sight, enhanced the effects of haze, further decreasing visual performance suggest that higher luminance transmittance mounted visors performed better. Overall, however, the results suggest that the ALEP visors and the standard USAF sun visor performed similarly, indicating that neither the dye technology used in ALEP visors nor the selective filtering of visual spectrum for laser protection is unique. It is recommended that the haze requirement for all ALEP visors not be relaxed from the current USAF helmet visor standard of 2.0%.