Potential impact of colors of filters used in sunglasses on the melatonin suppression process
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Centralny Instytut Ochrony Pracy – Państwowy Instytut Badawczy / Central Institute for Labour Protection – National Research Institute, Warszawa, Poland (Zakład Ochron Osobistych / Department of Protective Equipment)
Uniwersytet Medyczny w Łodzi / Medical University of Lodz, Łódź, Poland (Klinika Okulistyki i Rehabilitacji Wzroku / Department of Ophthalmology and Visual Rehabilitation)
Grzegorz Owczarek   

Centralny Instytut Ochrony Pracy – Państwowy Instytut Badawczy, Zakład Ochron Osobistych, ul. Wierzbowa 48, 91-133 Łódź
Med Pr 2017;68(5):629–637
Background: In this article the methods for determining spectral transmittance of optical radiation in the visible waveband range through selected materials used as optical filters against solar glare were described. Material and Methods: Transmittance coefficients specified for the fraction of light passing through tested filters, taking into account the mechanism of eye adaptation to daylight and night vision and the melatonin suppression process were compared for 4 dyed sunglass filters. Results: The values of transmittance coefficients specified for wavelength bands, 380–780 nm (for visible range) and 425–560 nm (for blue light range affecting the melatonin suppression process) were determined. Conclusions: The use of sunglasses with different color filters modifies the spectral characteristics of transmittance (spectrum) of visible light reaching the eye (including blue radiation) in such a way that it may have a potential impact on the melatonin suppression process. Med Pr 2017;68(5):629–637