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An Attempt at Preventing Asthenopia Among VDT Workers

Omori M., Watanabe T., Takai J., Takada H., Miyao M.

International Journal of Occupational Safety and Ergonomics

2003

Vol. 9, No. 4

453--462

We report the results of 3 surveys of visual display terminal (VDT) users who took a minibreak during which they viewed a stereoscopic image of a repeating parallel pattern showing planets. The single image stereogram method employed is called Stretch Eye™, and we evaluated the effects of Stretch Eye™ on asthenopia. An accommodative relaxation of about 1 D was observed in participants while they were gazing at the image. The employees of 2 information technology companies were evaluated according to a visual analogue scale (VAS) for subjective symptoms of asthenopia and eyesight. The results showed that Stretch Eye™ was effective in easing visual fatigue due to VDT work and it improved eyesight under working conditions.