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http://dx.doi.org/10.14479/jkoos.2014.19.2.135

Evaluation of Blue-light Blocking Ratio and Luminous Transmittance of Blue-light Blocking Lens based on International Standard  

Kim, Chang-Jin (Dept. of Optometry, Konyang University)
Choi, Sung Wook (Dept. of Optometry, Konyang University)
Yang, Seok Jun (Dept. of Optometry, Konyang University)
Oh, Sang-Young (Dept. of Optometry, Konyang University)
Choi, Eun Jung (Dept. of Optometry, Konyang University)
Publication Information
Journal of Korean Ophthalmic Optics Society / v.19, no.2, 2014 , pp. 135-143 More about this Journal
Abstract
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, UV-Vis 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 ANSI Z80.3:2010 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 blue-light blocking lens based in international standard.
Keywords
Blue-light blocking lens; Blue-light hazard function; Blue-light blocking ratio; Transmittance; Luminous transmittance;
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