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...
Adapted from the important key article by Dr. Charles Letocha, also the wonderful
book by Dr. John Levene and finally the comprehensive paper (yet ...
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 ...
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
Benjamin Franklin invented the lightning rod - iron furnace stove - bifocal glasses
and odometer - sp Ben Franklin.
To learn more about the remarkable life of Benjamin Franklin, we have collected
a variety of resources about his life and accomplishments!
Dr. Gary Heiting describes which type of bifocal and trifocal eyeglass lenses best
fit your vision ... Bifocal inventor Benjamin Franklin reading a manuscript. Later ...
Benjamin Franklin is credited with the invention of bifocal glasses, which he
sketched here for his friend George Whatley, a London merchant and
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 ...
Fascinating facts about the invention of Bifocals by Benjamin Franklin in 1760.