Ben Franklin had poor vision and got tired of putting on his spectacles, and having to take them off again, so, he invented a way to see both near and far by taking half of a lens from two different pairs of spectacles and put each half into a single frame. He called them bifocals. The year he invented them was 1784.
Ben Franklin and it was in 1783 (we are doing a big project in school on who evented what and when) my teacher even said this flat out in class...
The person that invented the bifocal lenses is Benjamin Franklin.
Benjamin Franklin created the bifocal lens. It is claimed that he created them in 1784 due to his having trouble with his own vision.
in 1784 by Benjamin Franklin.
1760s
benjamin franklin
1784
I've read that Benjamin Franklin invented them...
Glasses ...He invented Bifocals .
Bifocals are important for those with impaired vision, so they can see both far and near without taking off their glasses or switching them. They were invented by Benjamin Franklin in 1700â??s.
Ben Franklin invented the Lighting Rod,Bifocals,Frankiln Stove,Carriage Odometer and the Glass Armonica.
several things, including the lightning rod, the bifocals, and the Franklin stove. He was also known for his experiments with electricity and his discoveries in the field.
bifocals were invented on the 300th block of Market street in Philadelphia
ben Franklin invented his bifocals at his house in philly and made them on March 23.1784
Benjamin Franklin invented the bifocals
George Constant Louis Washington, not the president of the United States, is fabled to have invented bifocals. However Benjamin Franklin invented bifocals on May 23, 1785.
I've read that Benjamin Franklin invented them...
in Washington DC
Ben Franklin
he invented bifocals
The bifocals have changed alot since they were first invented. They have changed into different sizes, shapes and forms. They had also changed into sunglasses.:)
The bifocals were invented in 1784, by Benjamin Franklin, because he had seeing problems, and put two lenses of glass together to magnify his vision.
Bifocals are used for distance seeing or at close up seeing.
Benjamin Franklin.