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Bifocals - Wikipedia

en.wikipedia.org/wiki/Bifocals

Bifocals are eyeglasses with two distinct optical powers. Bifocals are commonly prescribed to ... Benjamin Franklin is generally credited with the invention of bifocals. Historians have produced som...

Benjamin Franklin-Father of the Bifocal - Antique Spectacles

www.antiquespectacles.com/topics/franklin/franklin.htm

It presented Benjamin Franklin as the inventor of bifocals. It is still considered the definitive paper on this topic because no new information has surfaced to the ...

Benjamin Franklin's contributions to science - USHistory.org

www.ushistory.org/franklin/science/

Benjamin Franklin's inventions, innovations and discoveries including the kite experiment, Franklin stove, bifocals, armonica and more.

Benjamin Franklin Bifocals

benjaminfranklinbio.com/bifocals-benjamin-franklin/122/

Nov 6, 2013 ... Ben Franklin Spectacles - As Benjamin Franklin aged, his vision, which had never been great, deteriorated even further. Like many of the ...

The Electric Ben Franklin - USHistory.org

www.ushistory.org/franklin/science/bifocals.htm

Bifocals. bifocals. College of Optometrists. A modern replica pair of the type of split bifocal spectacles known to have been worn by Benjamin Franklin in the mid  ...

Bifocals were invented in 1784, when Ben Franklin had troubl by ...

prezi.com/th85alooc7ym/bifocals-were-invented-in-1784-when-ben-franklin-had-troubl/

Aug 30, 2013 ... Facts Bifocals were invented in 1784, when Ben Franklin had trouble seeing both close up and far away. Franklin had two pairs of spectacles ...

When did Benjamin Franklin invent bifocals? | Reference.com

www.reference.com/history/did-benjamin-franklin-invent-bifocals-ea0f3ebea1bf582a

Benjamin Franklin invented bifocals in 1784. As announced in a letter to a friend, he called the new invention "double spectacles." The glasses allowed a person ...

Benjamin Franklin Invented Bifocals - Fact / Myth

factmyth.com/factoids/benjamin-franklin-invented-bifocals/

Jul 7, 2016 ... Benjamin Franklin is credited with inventing bifocals, although evidence suggests he may have been simply an early adopter of the split-bifocal ...

The 'inventor' of bifocals? - The College of Optometrists

www.college-optometrists.org/en/college/museyeum/online_exhibitions/artgallery/bifocals.cfm

US statesman Benjamin Franklin has long been credited with the invention of bifocal spectacle lenses, but whether this is historically accurate or merely a myth  ...

Ben Franklin and the Bifocal | Medgadget

www.medgadget.com/2005/07/ben_franklin_an.html

Jul 22, 2005 ... When you think of medgadgets, maybe eyeglasses don't spring to mind -- probably because they've been around so long, and are so prevalent ...