不同力度屏蔽蓝光对正常成年人眼视功能的影响

doi:10.3760/cma.j.issn.1674-845X.2017.11.004

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Abstract

Objective: To investigate the influence of different intensities of blue light shielding on the visual function of healthy adults. Methods: This self-controlled study enrolled 20 healthy adults who were students volunteers of Tongji University from August 2016 to March 2017. The subjects completed a 75-min reading task illuminated by blue light (440 nm) at shielding intensities of 0%, 20%, 30%, 40%, and 60%.Twenty-four color partial scoreswere calculated to detect variations in color discrimination. After completing the reading task, visual fatigue, accommodation response, and lens accommodation were assessed and compared amongthe five intensities of blue light shielding. The results were analyzed by signed-ranked test. Results: The scores of many colorswere significantly lower at blue light intensities of 30%, 40%, and60% compared to 0% intensity shielding (P < 0.05). The differences in color scores between 0% and 20% intensity shielding were not statisticallysignificant. After completing the reading task, the visual fatigue scores were lower with 20%, 30%, 40%, and 60% intensity shielding compared to 0% intensity shielding(all P < 0.05). The difference between before and after reading task in accommodation amplitude and positive relative accommodation were significantly lower at 20%, 30%, 40%, and 60% intensity shielding compared to 0% shielding (P < 0.05). Difference between before and after reading task in native relative accommodation were significantly lower at 40% and 60% intensity shielding compared to 0% shielding(P < 0.05). The differences betweenthe before and after reading task values of the 20% and 30% shielding were not significantly different from the 0% shielding. Lastly,differences between before and after reading task in lens accommodation at 20%, 30%, 40%, and 60% intensity shielding were not significantly different from 0% shielding. Conclusions: With blue light (centered at 440 nm) shielding of 20% to 60% intensity20 band wavelength, the accommodation and visual fatigue of healthy adults improved.When the shielding
intensity was 30% to 60%, the color perception was worse.

Key words： blue light video terminal syndrome accommodation responses visual fatigue colordiscrimination

Received: 07 July 2017

Fund:

This study was funded by Research and Innovation Projects of Tongji University-Jilin University-Laiming Technology in Taiwan (15082450001)

Corresponding Authors: Yanlong Bi, Department of Ophthalmology, Tongji Hospital Affiliated with Tongji University, Shanghai 200065, China (Email: biyanlong@tongji.edu.cn)

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	Ranran Chen
	Jinzhong Wu
	Zijing Wu
	Guozhen Niu
	Juan Zhang
	Guiqin Sui
	Yanlong Bi

Cite this article:

Ranran Chen,Jinzhong Wu,Zijing Wu等. Effect of Different Intensities of Blue Light Shielding on Visual Function of Normal Adults[J]. Chinese Journal of Optometry Ophthalmology and Visual science, 2017, 19(11): 656-662.

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https://www.cjoovs.com/EN/10.3760/cma.j.issn.1674-845X.2017.11.004 OR https://www.cjoovs.com/EN/Y2017/V19/I11/656

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