When were eyeglasses invented?
On 16th September 1284, the first wearable eyeglasses of metal lens were invented by an Italian, Salvino d’Armati. The British optician Edward Scarlett in 1727 invented the eyeglasses frame of modern style by putting arms on eyeglasses. Benjamin Franklin invented the bifocal lenses in 1784. The British astronomer and mathematician, George Airy made the first lenses to correct astigmatism in 1825. The trifocal lens was invented in 1826 by John Hawkins. The progressive multifocal lens was created by Essilor in 1958.