27+ Benjamin Franklin Eyeglasses Bifocals Images. This page is about benjamin franklin bifocal reading glasses,contains what are bifocal glasses?,happy birthday benjamin franklin!,benjamin franklin's inventions,benjamin franklin bifocals; However, did you know that the 17th century american was also the inventor of bifocal eyeglasses?

The Politician
The Politician from www.college-optometrists.org
He invented the lightening rod, bifocals, the franklin stove and the odometer. In order to solve his problem, he split the lenses of each pair of his glasses. Two decades after franklin's death, thomas jefferson requested a pair of bifocals to be crafted for his use and described them as an invention of dr.

Benjamin franklin invented the lightning rod, the iron furnace stove, bifocal glasses, and odometer, just to name a few of his accomplishments.

1200 x 900 jpeg 434 кб. Bifocals are eyeglasses with two distinct optical powers, bifocals are commonly prescribed to people with presbyopia who also require a correction for myopia, hyperopia, and/or astigmatism. However, did you know that the 17th century american was also the inventor of bifocal eyeglasses? He was born in 1706 and died at 1790.