| 摘要 |
<p>As computerization develops and office automation as well as factory automation progress in every field, the problem has been posed in Japan and Western countries that the degree of fatigue experienced by operators who are engaged in VDT operations is higher than that of clerical employees who are engaged in general office work and VDT operations pose a stronger risk of causing illness. The present invention provides glasses employing special lenses each produced by measuring the distortion of the eyeball of a user of glasses and setting a polarizer on the basis of an angle corresponding to the astigmatic angle of the user, thereby allowing a clear image to be projected on the retina and partially reducing the bundle of rays entering the eyeball by virtue of the polarizing effect, whereby the load on the eyeball is reduced. In addition, the sphincteral and dilative phenomenon of the pupil is reduced by equalizing the degree of brightness throughout the portion at which the operator conducting a VDT operation gazes steadily, whereby a part of the eye strain is alleviated. The present invention has a wide range of applications as not only glasses for computer VDT operations but also sunglasses and glasses for industrial purposes, such as welding.</p> |
