Common Ground - In 1785, Benjamin Franklin wrote to a friend describing his “double glasses” solution to needing two pairs of glasses of different focusing power to see objects near and far.
Numbers in the News: Benjamin Franklin Science Article for Students | Scholastic Science World Magazine
Ben Franklin Glasses - Ben Franklin Spectacles | Benjamin Franklin
Benjamin Franklin: An American Life: 8601400226605: Isaacson, Walter: Books - Amazon.com
Benjamin | Bevel | Titan Collection | Exclusive Eyewear
65 Ben Franklin Glasses Stock Photos, High-Res Pictures, and Images - Getty Images