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KMID : 1011420180230040441
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Journal of Korean Ophthalmic Optics Society
2018 Volume.23 No. 4 p.441 ~ p.451
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Effect of Blue Light-Blocking Lens on Accommodative Function during Near Work with Different Background Colors using a Smart Device
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Kim Ji-Hye
Kang Min-A
Kim Ju-Hee
Shin Jang-Cheol
Kim So-Ra
Park Mi-Jung
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Abstract
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Purpose: In this study, we investigated the effect of blue light-blocking lenses on accommodative functional changes caused by chromatic aberration, with respect to near work, when participants operated smart devices with white or blue backgrounds.
Methods: The subjects were asked to set the iPad's background to either white and blue and conduct near work for 10 minutes while wearing either non-blue light-blocking or blue light-blocking lenses (Perfect UV, BB). Accommodative function before and after near work was evaluated and analyzed.
Results: Changes in accommodative function was not different when subjects wore either non-blue light-blocking or blue light-blocking lenses and performed near work using the iPad with the white background. The accommodative lag was unchanged for subjects with non-blue light-blocking lenses when they used the iPad with the blue background to perform near work; accommodative amplitude and accommodative lag were reduced in this group. However, wearing blue light-blocking lenses while operating the iPad with the blue background increased the accommodative lag and maintenance of accommodative amplitude and facility. Although there is a slight difference in the blocking rate of a certain wavelength range between two blue light blocking lenses, their effect on the accommodative function was not significantly different.
Conclusions: Our study revealed that blue light, which has a shorter wavelength than white light with mixed wavelength, induced greater changes in accommodative function and that blue light-blocking lenses are effective in accommodative functional changes. This study provides visual functional evidence for changes in subjective symptoms related to blue light-blocking lens.
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KEYWORD
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Chromatic aberration, Blue light-blocking lens, Accommodative amplitude, Accommodative facility, Accommodative lag
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