they where invented for people who arent far sighted or near sighted so that they can see far and near
ben Franklin invented his bifocals at his house in philly and made them on March 23.1784
Bifocals were invented by Benjamin Franklin in the United States around 1784. Franklin designed them to help him see both up close and far away without having to switch between different pairs of glasses.
Ben Franklin was getting older and couldn't see as well he had both kinds of glasses near sighted and far sighted he cut the lens in half and then glued them together this was the 1st pair of bifocals
Bifocals have evolved with advancements in technology and materials. Modern bifocals are available in more styles, materials, and designs to cater to individual preferences and needs, such as progressive lenses that offer a seamless transition between different prescriptions. Additionally, developments in lens coatings and anti-reflective treatments have improved clarity and comfort for wearers.
The bifocals he bought were used. The lower lenses on my bifocals allow me to read more easily.
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.
ben Franklin invented his bifocals at his house in philly and made them on March 23.1784
in Washington DC
he invented bifocals
I've read that Benjamin Franklin invented them...
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.
Bifocals were invented by Benjamin Franklin in the United States around 1784. Franklin designed them to help him see both up close and far away without having to switch between different pairs of glasses.
Benjamin Franklin.
Glasses ...He invented Bifocals .
Benjamin Franklin