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KMID : 1011420140190020135
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Journal of Korean Ophthalmic Optics Society
2014 Volume.19 No. 2 p.135 ~ p.143
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Evaluation of Blue-light Blocking Ratio and Luminous Transmittance of Blue-light Blocking Lens based on International Standard
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Kim Chang-Jin
Choi Sung-Wook
Yang Seok-Jun
Oh Sang-Young
Choi Eun-Jung
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Abstract
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Purpose: To evaluate the blue-light blocking ratio and luminous transmittance of blue-light blocking lenses using the blue-light hazard function as specified in international standard.
Methods: In order to calculate the blue-light blocking ratio and luminous transmittance for a total of 41 blue-light blocking lenses from 8 manufacturers, UVVis spectrophotometer was used for measuring the spectral transmittance of wavelengths from 380 to 780 nm. Blue-light blocking ratio was calculated using blue-light hazard function as specified in ANSIZ80.3:2010 and ISO 13666(or Korean Standard KS B ISO 13666:2004).
Results: The range of the blue-light blocking ratio was from 9.3 to 96.8%, the range of the transmittance from 53.5 to 92.7%, and the range of the luminous transmittance from 58.0% to 98.1%. In general the blue-light blocking lens prepared by coating tended to have a higher luminous transmittance, while those prepared by tinting a higher blue-light blocking ratio.
Conclusions: The behavior of the spectral distribution of lenses showed the possibility of the performance improvement in the blue-light blocking lenses. Manufactures need to acquire their own technology that can evaluate the performance of bluelight blocking lens based in international standard.
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KEYWORD
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Blue-light blocking lens, Blue-light hazard function, Blue-light blocking ratio, Transmittance, Luminous
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