|
KMID : 1011420170220010081
|
|
Journal of Korean Ophthalmic Optics Society
2017 Volume.22 No. 1 p.81 ~ p.88
|
|
|
The Effect of Blue-light Blocking Ophthalmic Lenses on Legibility and Fatigue during Near work with a Smartpad
|
|
Kim Hyun-Jin
Kong Hyeon-Ung
Park Mi-Jung
Kim So-Ra
|
|
|
Abstract
|
|
|
Purpose: This study aimed to investigate the effect of blue-light blocking ophthalmic lenses on legibility and fatigue during near work with a smartpad.
Methods: Twenty-two subjects, who had a binocular vision of 0.8 or greater and no ocular disease, were asked to use a smartpad for 10 minutes after overlaying two kinds of blue-light blocking lenses (BRC and BB lens) and a plano lens on a trial lens frame. Before and after reading, non-invasive tear break up time(NIBUT) and their fatigue were respectively measured, and the clinical effect of blue-light blocking lenses were analyzed by estimating reading speed and recovery time of tear film after reading.
Results: Under the dark light, relatively lower NIBUT was shown in the case of blue-light blocking lenses compared to it with a plano lens during a display work with a smartpad. As a result of recovery time of tear film after reading, the rate showed a tendency to be faster in the order of the BB > plano > BRC lens under the bright condition however, the rate was shown to be faster in the order of the BRC > plano > BB lens under the dark condition. In the subjective symptoms questionnaire, general symptoms showed a tendency to be higher with wearing the blue-light blocking lenses than plano lens however, ocular symptoms were lower under bright illumination when using a BRC lens.
Conclusions: From the results of this study, blue-light blocking lenses show the effect on the recovery rate of tear film and the reduction of subjective ocular symptoms after a display work; however, the degree varies depending on the illumination conditions. Therefore, it is suggested to select an appropriate blue-light blocking lens according to the working conditions in order to reduce the eye fatigue during the display work.
|
|
|
KEYWORD
|
|
|
Blue-light blocking ophthalmic lenses, Smartpad, Legibility, Reading speed, NIBUT, Recovery time of tear film, Fatigue
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|