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Li Zhang, Liang Xu, Jianjun Li, Shiqiang Zhao; Study of accommodative function examination to assess visual fatigue induced by watching 3D video. Invest. Ophthalmol. Vis. Sci. 2016;57(12):3967.
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© ARVO (1962-2015); The Authors (2016-present)
It can cause severe visual fatigue by watching three dimensional (3D) video. In this study, we explored the visual fatigue induced by watching 3D video using accommodation analyzer-1(AA-1) and accommodative functional examination.
Forty eight healthy subjects aged from 20 to 30, refractive status being emmetropia, mild or moderate myopia (sphere degree>-5.0 D, cylinder degree within +1.0 D) participated in this study. Each subject watched two kinds of stereo television for 40 minutes in two morning. Television A was polarized 4K stereo display, television B was shutter-glass 4K stereo display. Before and after watching 3D, accommodative functional examination was done using phoropter, accommodative response and HFC values were examined by AA-1. Main outcome measures included amplitude of accommodation, positive and negative relative accommodation (PRA, NRA), microfluctuation high frequency (HFC) examined by AA-1, and subjective questionnaire scores were recorded. The difference of accommodative measures before and after watching two kinds of 3D display were analyzed using SPSS software.
After watching television B, the mean value of amplitude of accommodation in right eye (13.92D) was larger than that (13.22D) before watching, P=0.035; before watching (13.93D) in left eye was larger than that after (15.28D), P=0.018. After watching television A, the mean value of amplitude of accommodation only in left eye was larger than that before watching, P=0.010. Regarding HFC value examined by AA-1, after watching television A, the mean value of HFC in two eyes were larger than that before watching (60.10D,60.26D), P=0.450 for right eye and P=0.001 for left eye (61.22D,61.84D), After watching A, accommodative strain had shown. After watching television B, the mean values of HFC in two eye (58.45D, 59.59D) were smaller than that before watching (58.93D, 60.87D), P=0.000 for two eyes. The accommodative response had declined afte being given accommodative stimulus. After watching B, the decline of accommodative function had shown. The score of subjective questionnaire for television A (score 3.13) was better than that for television B (score 3.70).
The changes of accommodative response and HFC value have occurred after watching 3D video. Watching 3D video can induce visual fatigue.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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