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http://dx.doi.org/10.5762/KAIS.2016.17.5.612

Effects of Stray Light in Blue-light Blocking Lens on the Quality of Image  

Yuk, Ju Sung (Department of Optometry, Konyang University)
Yang, Seok-Jun (Department of Optometry, Konyang University)
Kim, Yong Gwon (Department of Radiological Science, Konyang University)
Choi, Eun Jung (Department of Optometry, Konyang University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.5, 2016 , pp. 612-618 More about this Journal
Abstract
The aim of this study is to investigate the effects of stray light originating from the blue-light blocking lens on the quality of the image. After designing the ideal spectacle lens, anti-reflection spectacle lens without internal reflection, anti-reflection spectacle lens with internal reflection, and blue-light blocking lens with internal reflection, the light intensity distribution and stray light distribution were derived. The designed spectacle lenses are meniscus lenses with a refractive power of 0.00 D, refractive index of 1.56, and a radius of 155.15 mm. The peaks of reflectance of the 4 types of blue-light blocking lenses are in the range between 430 nm and 440 nm, and their reflectances are 5%, 10%, 15%, and 20%, respectively. According to the analysis results, as the reflectance of the blue-light blocking lens increases, the light intensity in the center of the lens decreases and the intensity of the stray light in the center-periphery and periphery of the lens increases. This trend appeared to intensify with increasing reflectance of the blue-light blocking lenses. Because the increase in the reflectance of the blue-light blocking lens degrades the quality of the image by increasing the intensity of the stray light in the center-periphery and periphery of the lens, its reflectance needs to be adjusted by varying the blue-light blocking ratio and the luminous transmittance, in order to diminish the level of visual discomfort.
Keywords
Blue-light blocking lens; Internal reflection; Quality of image; Stray light;
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Times Cited By KSCI : 15  (Citation Analysis)
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