不同力度屏蔽蓝光对正常成年人眼视功能的影响

Original Article

Effect of Different Intensities of Blue Light Shielding on Visual Function of Normal Adults

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

Published on 2017-11-25

Cite as Chin J Optom Ophthalmol Vis Sci, 2017,19(11): 656-662. DOI: 10.3760/cma.j.issn.1674-845X.2017.11.004

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%, and 60% 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%="">

Conclusions:

With blue light (centered at 440 nm) shielding of 20% to 60% intensity 20 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; color discrimination

Contributor Information

Chen Ranran

Department of Ophthalmology, Tongji Hospital Affiliated with Tongji University, Shanghai 200065, China

Wu Jinzhong

Polaroid Technology Research and Development Center of Laiqi, Xiamen 361000, China

Wu Zijing

Polaroid Technology Research and Development Center of Laiqi, Xiamen 361000, China

Niu Guozhen

Department of Ophthalmology, Tongji Hospital Affiliated with Tongji University, Shanghai 200065, China

Zhang Juan

Department of Ophthalmology, Tongji Hospital Affiliated with Tongji University, Shanghai 200065, China

Sui Guiqin

Department of Ophthalmology, the Second Hospital of Jilin University, Changchun 130000, China

Bi Yanlong

Department of Ophthalmology, Tongji Hospital Affiliated with Tongji University, Shanghai 200065, China