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In 1784, Benjamin Franklin invented bifocals... | Sutori
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AZ RETINA Project on Twitter: "Benjamin Franklin was the first to invent # bifocals which helped people see both far and close distances all in one pair of spectacles. He accomplished this around
Benjamin Franklin Invented Bifocals - Fact or Myth?
History of Glasses (Kiya H.) timeline | Timetoast timelines
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