| 摘要 |
PROBLEM TO BE SOLVED: To provide work spectacles that reduces the burden on the eye and prevents symptoms of eyestrain such as focus freezing, an ache of the eye, a headache, and stiff in the shoulders, especially, in operations done over a watch at the display of a personal computer, etc. SOLUTION: The work spectacles for display viewing operations is characterized in that the dioptor assisting adjusting power needed to view at 0.4 to 0.6 m as a viewpoint distance for display viewing operations is set to a dioptor which does not fully assist the adjusting power of a person who wears the work spectacles. COPYRIGHT: (C)2005,JPO&NCIPI
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