Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Patent
1969-11-20
1977-05-17
Sacher, Paul A.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
351 47, G02C 716, G02C 900
Patent
active
040238920
ABSTRACT:
Spectacle frame with plano or prescription lenses, or having no lenses, is provided with screen or shield structure only for the eye farthest from the lane of approaching traffic to protect against dazzle from the lights of approaching vehicles. In the United States, where "right hand driving" is the traffic rule, such protection is only for the right eye. The screen shields the inner or nasal half of the protected eye, the full height of the lens rim. At the protected eye, the frame may also have a screen across the minor upper part of the lens rim. The screens may be opaque, or a filter, neutral or colored, having a density of 0.5 to 1.5, which is found practical. The screens may be of sheet material, releasably movably mounted, so their positions are adjustable. This invention utilizes better and more effectively the characteristics of eye behavior, that protection of only one eye, with maintainance of vision, will protect a nocturnal driver from dazzle and discomfort. Use of this invention allows full free movement of the driver's head.
REFERENCES:
patent: 1740835 (1929-12-01), Riderich
patent: 2120727 (1938-06-01), Bell
patent: 2146544 (1939-02-01), Kleine
patent: 3111675 (1963-11-01), Mora
patent: 3421233 (1969-01-01), Gaal
"The Perception of Brightness and Darkness," Leo M. Hurvich et al., 1966.
Lukacher Martin
Sacher Paul A.
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