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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Bifocals - The Amazing Adventures of Ben Franklin - TIME
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Image of BIFOCALS, 1760s. - Benjamin Franklin's Sketch For Bifocal Eyeglasses, Which He Is Credited With Inventing. From Granger - Historical Picture Archive
Benjamin Franklin's Visionary Innovation: The Creation of Bifocals – StMU Research Scholars
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