Who invented bifocals?
The first eyeglasses could only be used to rectify hyperopia or presbyopia, the eyeglasses for myopia appeared later. But there had been no single solution to help those who suffered from both types of vision impairments until 1784.
American polymath Benjamin Franklin is credited for inventing bifocals in 1784. He created them because he was tired of switching eyeglasses for far and near. Therefore, he combined the two lenses by cutting them and then combining the segments into one glass with a sharp switch between the upper and lower lenses.
In the 19th century, Louis de Wecker, a French ophthalmologist, helped to improve the original model by fusing the upper and lower sections.
Peter Williams, who invented trifocal lenses, is known for coining the term “bifocals” in 1824, although he credited Benjamin Franklin for the invention.
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