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Benjamin Franklin: statesman, author, postmaster, inventor of the bifocal, the lending library and the Franklin stove.
FORBES: Magazine Article
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Christine McCleary leaves glasses in different prescriptions and combinations in strategic spots around the house, including bifocal sunglasses for driving and two strengths of computer glasses for multitasking.
WSJ: How Technology Tries Our Eyesight
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In the 1780s, Benjamin Franklin invented the bifocal.
FORBES: Magazine Article