Web Results

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

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

Adapted from the important key article by Dr. Charles Letocha, also the wonderful book by Dr. John Levene and finally the comprehensive paper (yet ...

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 ...

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  ...

Inventions and Achievements of Benjamin Franklin - Inventors

inventors.about.com/od/fstartinventors/ss/Franklin_invent.htm

Benjamin Franklin invented the lightning rod - iron furnace stove - bifocal glasses and odometer - sp Ben Franklin.

About Benjamin Franklin: Inventor of the Bifocal Glasses

www.readers.com/blog/education/benjamin-franklin/

To learn more about the remarkable life of Benjamin Franklin, we have collected a variety of resources about his life and accomplishments!

Bifocals and Trifocals for Vision After Age 40 - AllAboutVision.com

www.allaboutvision.com/over40/segmented.htm

Dr. Gary Heiting describes which type of bifocal and trifocal eyeglass lenses best fit your vision ... Bifocal inventor Benjamin Franklin reading a manuscript. Later ...

Scientist and Inventor: Benjamin Franklin: In His Own Words ...

www.loc.gov/exhibits/treasures/franklin-scientist.html

Benjamin Franklin is credited with the invention of bifocal glasses, which he sketched here for his friend George Whatley, a London merchant and pamphleteer.

Bifocals - The Amazing Adventures of Ben Franklin - TIME

content.time.com/time/specials/packages/article/0,28804,2012113_2011976_2011965,00.html

Tired of changing eyeglasses to see near and far, Franklin simply combined two pairs into one. He praised his device as allowing him to see both his dinner and ...

Bifocal Glasses History - Invention of Bifocal Glasses

www.ideafinder.com/history/inventions/bifocals.htm

Fascinating facts about the invention of Bifocals by Benjamin Franklin in 1760.

More Info

Benjamin Franklin's contributions to science - USHistory.org

www.ushistory.org

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

The Electric Ben Franklin - USHistory.org

www.ushistory.org

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  ...

Benjamin Franklin . Inquiring Mind . It's the Little Things | PBS

www.pbs.org

Some of his inventions, like bifocal glasses, are well-known, while others are more obscure. Of the numerous inventions Franklin created, he did not patent a ...