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. 2005 Nov;41(11):986-9.

[Effects of short-term VDT usage on visual functions]

[Article in Chinese]
Xiao-mei Qu  1 , Ren-yuan Chu, Lin Wang, Pei-jun Yao, Jing-rong Liu
Affiliations
  • PMID: 16318749

[Effects of short-term VDT usage on visual functions]

[Article in Chinese]
Xiao-mei Qu et al. Zhonghua Yan Ke Za Zhi. 2005 Nov.

Abstract

Objective: To evaluate the effects of short-term VDT usage on visual functions.

Methods: Visual function of the video display terminal (VDT) operators before and after 1 hour VDT usage were assessed. These included refraction, amplitude of accommodation, near point of convergence, AC/A, phorias, fusional convergence and divergence, tear film break time (BUT) and aberrations. And the same situation was compared was the non-VDT usage.

Results: In comparison with pre-VDT use, amplitude of accommodation, BUT were significantly decreased (P < 0.05), near point of convergence, near lateral exophoria were significantly increased after VDT use (P < 0.05). Total, high order, 4th and 5th order aberrations were significantly greater after VDT use (P < 0.05).

Conclusions: Short-term VDT work does have a significantly greater temporarily effect on visual function, tear film quality and visual quality.

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