• Title/Summary/Keyword: Industrial works

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Change on Lens Accommodation and Pupil Light Reflex in VDT works (VDT작업이 안 조절반응과 동공 대광반사에 미치는 영향)

  • Kim, Eun-A;Kim, Yang-Ho;Jin, Young-Woo;Chai, Chang-Ho;Choi, Yong-Hyu;Moon, Young-Hahan
    • Journal of Preventive Medicine and Public Health
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    • v.30 no.3 s.58
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    • pp.599-608
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    • 1997

  • We studied on change of lens accommodation and pupil light reflex caused by VDT work in six women and compared them with those of other office works. The results were as follows. 1. In VDT work the accommodation contraction velocity decreased during the first 2-hr VDT task, then recovered markedly by the end of the one-hour lunch break, and decreased again by the end of the 2nd 2-hr VDT task. Changes of relaxation velocity showed similar pattern although it was less typical than that of contraction velocity 2. There was no marked change in accommodation contraction velocity and amplitude of accommodation in general office work and near-distance office work, and in the near-distance office work accommodation relaxation velocity decreased according to work load without recovery after lunch break. 3. Initial pupil diameter, initial pupil area of light reflex decreased significantly during VDT task only in VDT work and didn't recover after lunch break. These results suggest possibility that changes of accommodation contraction velocity, accommodation relaxation velocity, near point distance, and pupil diameter and area are useful in evaluating characteristics of VDT work. For this, more research adjusted individual differences, circadian rhythm, emotional stress needs.

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