Show den franklins glasses glare everybody who uses bifocal glasses probably wonders where the idea originally carno camo from lil focal glasses are the kind that hat two ze parate lenses cemented comen ted together so BO that by looking in the upper part one can see fieo tit at a great distance dle tance and by looking through the lower half one ran an read most alost authorities are inclined to give Frank franklin lia credit tor for the invention a ile he was so BO the story stor goes an inveterate reader and could not use his reading glasses when whon looking any distance stanco dt away avay finally the notion came to him that ho he could combino combine his glasses and lie he thore thereupon upon had the lenses leists cut in halt half und ind one half of each lens placed la in the rim of each spectacle rim the result was that a single pair of glasses was sulli sufficient clent though present day oculists state that the ho sharply drawn line must have affected his bis eyes from this idea the oculists gradually developed a glass in which the lower part was arranged arr aneed for reading and the upper part forlong distance vision while the annoy ing marking line was eliminated |