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KMID : 1011420120170030285
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Journal of Korean Ophthalmic Optics Society
2012 Volume.17 No. 3 p.285 ~ p.291
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Changes in Accommodative Function after VDT Work
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Seo Eun-Sun
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Abstract
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Purpose: This study was conducted to research any effect on visual function related to accommodation by VDT work.
Methods: The refraction power, accommodative lag, accommodative facility, relative accommodation, amplitude of accommodation and blink rate were measured before and after VDT work for 2 hours on 48 university students (16 males and 32 females), without abnormal accommodative function and systemic and ocular disease, who had never undergone corrective eye surgery. All examinations were performed with distant refraction, and a survey was conducted on the items related to subjective symptoms of VDT syndrome.
Results: After 2 hours of VDT work, refractive power increased by 0.23 D, the amount of change in accommodative lag were 0.17±0.42 D in the right eye and 0.23±0.47 D in the left eye (t=2.26, p=0.03). There were statistically significant differences. Both the accommodative facility and relative accommodation and amplitude of accommodation were decreased after work. However, blink rate were increased. After VDT work, 33.4% of the subjects showed subjective symptoms of asthenopia and 33.3% of them showed shoulder pain.
Conclusions: As a result, the accommodative lag increased in response to the two hours of VDT work, and overall accommodative functions were decreased. In addition, as symptoms of providing visual strain, asthenopia showed the most prominent subjective symptoms.
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KEYWORD
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VDT work, MEM, Accommodative lag, accommodative facility, Relative accommodation, Amplitude of accommodation
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