Sunglass Filter Transmission and Its Operational Effect in Solar Protection for Civilian Pilots.
Chorley, AC, Lyachev, A, Higlett, MP, Khazova, M, Benwell, MJ and Evans, BJW (2016). Sunglass Filter Transmission and Its Operational Effect in Solar Protection for Civilian Pilots. Aerospace Medicine and Human Performance. 87 (5), pp. 436-442.
|Authors||Chorley, AC, Lyachev, A, Higlett, MP, Khazova, M, Benwell, MJ and Evans, BJW|
INTRODUCTION: The ocular effects of excess solar radiation exposure are well documented. Recent evidence suggests that ocular ultraviolet radiation (UVR) exposure to professional pilots may fall outside international guideline limits unless eye protection is used. Nonprescription sunglasses should be manufactured to meet either international or national standards. The mean increase in UVR and blue light hazards at altitude has been quantified and the aim of this research was to assess the effectiveness of typical pilot sunglasses in reducing UVR and blue light hazard exposure in flight. METHOD: A series of sunglass filter transmittance measurements were taken from personal sunglasses (N = 20) used by pilots together with a series of new sunglasses (N = 18). RESULTS: All nonprescription sunglasses measured conformed to international standards for UVR transmittance and offered sufficient UVR protection for pilots. There was no difference between right and left lenses or between new and used sunglasses. All sunglasses offered sufficient attenuation to counter the mean increase in blue light exposure that pilots experience at altitude, although used sunglasses with scratched lenses were marginally less effective. One pair of prescription sunglasses offered insufficient UVR attenuation for some flights, but would have met requirements of international and national standards for UV-A transmittance. This was likely due to insufficient UVR blocking properties of the lens material. CONCLUSIONS: Lenses manufactured to minimally comply with standards for UVR transmittance could result in excess UVR exposure to a pilot based on in-flight irradiance data; an additional requirement of less than 10% transmittance at 380 nm is recommended.
|Keywords||Cornea; Humans; Occupational Diseases; Equipment Design; Eye Protective Devices; Aerospace Medicine; Ultraviolet Rays; Environmental Exposure; Occupational Exposure; Radiation Protection; Aerospace Medicine; Cornea; Environmental Exposure; Equipment Design; Eye Protective Devices; Humans; Occupational Diseases; Occupational Exposure; Radiation Protection; Ultraviolet Rays|
|Journal||Aerospace Medicine and Human Performance|
|Journal citation||87 (5), pp. 436-442|
|Publisher||London South Bank University|
|Digital Object Identifier (DOI)||doi:10.3357/AMHP.4499.2016|
|01 May 2016|
|Publication process dates|
|Deposited||05 Apr 2018|
|Accepted||01 Mar 2016|
|Accepted author manuscript|
CC BY 4.0
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