BIFOCALS, 1760s. Benjamin Franklins sketch for bifocal
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Benjamin Franklin announces his invention of bifocals | MAY 23 - Samoa Global News
Benjamin Franklin | The Invention of Bifocal Lenses | The History of Optometry - YouTube
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SVS Vision - Do you wear Bifocal lenses? Did you know that Benjamin Franklin created the Bifocal lens by piecing together two lenses into one frame? He announced his creation on this
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Invention Of Bifocal Lenses By Benjamin Franklin | Invention By Founding Father Of America - YouTube
Image of BIFOCALS, 1760s. - Benjamin Franklin's Sketch For Bifocal Eyeglasses, Which He Is Credited With Inventing. From Granger - Historical Picture Archive
Benjamin Franklin invented the bifocals eyeglasses in 1784… | Flickr
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Benjamin Franklin | The Invention of Bifocal Lenses | The History of Optometry - YouTube
Ben Franklin Eyeglasses - Bi-Focals Photograph by Jack R Perry - Fine Art America
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Newburgh Free Library - The vision impaired send a big thank you to Benjamin Franklin for inventing bifocal glasses. He made his announcement on May 23, 1785. Any day is a great
