发明人: Mark E. Montgomery 被引量: 166 摘要: The present invention teaches a new category of bifocal sunglasses utilizing a vertically polarized upper lens portion and a non-polarized light absorbing lower lens segment mechanically affixed to the upper portion.收藏...
Polarized and non-polarized bifocal spectaclesThe present invention teaches a new category of bifocal sunglasses utilizing a vertically polarized upper lens portion and a non-polarized light absorbing lower lens segment mechanically affixed to the upper portion.doi:US20040046927 A1Mark E. Montgomery...
Maple Oversized RoundNon-Rx Glasses- Tortoiseshell Tags: hiking-in-woods no_nose_pads matte Square_Face_Shape Oval_Face_Shape under9 tryon_glasses under15 vintage-glasses casual-glasses top-rated fall-leaves tr90 all bifocal-glasses reading-glasses ...
Most vendors offer standard and bifocal lenses, and some vendor locations also offer transitional lenses that lighten up indoors and darken when outdoors. Reading glasses may be available in both full reading vision and in bifocals. Bifocals, invented by Benjamin Franklin in 1790, have a lower seg...
Polarized and non-polarized bifocal spectaclesUS20040046927 Aug 27, 2003 Mar 11, 2004 Montgomery Mark E. Polarized and non-polarized bifocal spectaclesUS20040046927 * Aug 27, 2003 Mar 11, 2004 Montgomery Mark E. Polarized and non-polarized bifocal spectacles...