[Effects of short-term VDT usage on visual functions].
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.
Qu
Xiao-mei
XM
Department of Ophthalmology, Eye Ear Nose & Throat Hospital, Fudan University, Shanghai 200031, China. quxiaomei2002@126.com
Chu
Ren-yuan
RY
Wang
Lin
L
Yao
Pei-jun
PJ
Liu
Jing-rong
JR
D000293:Adolescent; D000328:Adult; D016288:Computer Terminals; D005260:Female; D006801:Humans; D008297:Male; D009216:Myopia / Q000503:physiopathology; D013285:Strabismus / Q000503:physiopathology; D015357:Vision Disparity / Q000502:physiology; D014785:Vision, Ocular / Q000502:physiology*; D014792:Visual Acuity / Q000502:physiology*; D055815:Young Adult