Lyon Joseph L, Lillquist Dean R, Alder Steven, Stephenson Dale, Bloswick Donald S
Rocky Mountain Center for Occupational and Environmental Health, Department of Family and Preventive Medicine, Salt Lake City, Utah 84112-5120, USA,
Work. 2003;20(1):77-80.
A population of 72 bifocal wearers was studied to determine the relationship between VDT (video display terminal) placement for those who reported musculoskeletal pain and those who did not. The mean hours worked was 50.4 minutes (p=0.003) greater for those who reported head/neck pain versus those who did not and 48.6 minutes (p=0.004) greater for those who reported shoulder/arm pain that those who did not. There was no statistically significant difference between the means of monitor height, distance, or angle for those who reported pain symptoms versus those who did not. This study indicates that, self reported pain symptoms are correlated with hours of VDT work and that there appears to be a threshold at approximately five hours for pain symptoms among bifocal wearers. No such correlation can be made for monitor placement
对72名双焦点眼镜佩戴者进行了研究，以确定报告有肌肉骨骼疼痛者与无疼痛者的视频显示终端（VDT）放置情况之间的关系。报告有头部/颈部疼痛者的平均工作时长比无疼痛者长50.4分钟（p = 0.003），报告有肩部/手臂疼痛者的平均工作时长比无疼痛者长48.6分钟（p = 0.004）。报告有疼痛症状者与无疼痛者在显示器高度、距离或角度的均值上无统计学显著差异。该研究表明，自我报告的疼痛症状与VDT工作时长相关，并且双焦点眼镜佩戴者中疼痛症状出现的阈值似乎约为5小时。显示器放置情况不存在此类相关性。
