Benjamin Franklin: statesman, author, postmaster, inventor of the bifocal, the lending library and the Franklin stove.

FORBES: Magazine Article

Christine McCleary leaves glasses in different prescriptions and combinations in strategic spots around the house, including bifocal sunglasses for driving and two strengths of computer glasses for multitasking.

WSJ: How Technology Tries Our Eyesight

In the 1780s, Benjamin Franklin invented the bifocal.

FORBES: Magazine Article