... invented bifocals, and perhaps 50 years earlier than had been originally thought. ... Since many inventions are developed independently by more than one person, ...

Details of Benjamin Franklin's many discoveries and inventions, including bifocals.

10 мая 2024 г. · Franklin is widely credited as the inventor of bifocals.

In 1824, Peter Williams came up with the name “bifocals” for this type of corrective eyewear. Williams would later be credited with the invention of trifocal ...

Benjamin Franklin, who died 200 years ago, is generally credited with the invention of bifocals. However, serious historians have from time to time produced ...

Patented by Benjamin Franklin in 1784, bifocal lens technology saw relatively few advances over the next 175 years. The bifocal lens with its two parts--the top ...

13 мар. 2020 г. · There is no proof that Benjamin Franklin invented bifocal lenses. There are no patents or definitive proof who actually came up with the idea.

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

The American scientist Benjamin Franklin invented bifocals . Bifocals are eyeglasses with two distinct optical powers. Bifocals are commonly prescribed.