Aside from being one of the Founding Fathers of the USA, Benjamin Franklin was a prolific inventor and many of his inventions were based on solving real and everyday problems, as a means of making people's lives easier. His invention of bifocal glasses, for example, made life far easier for people who needed glasses for distance as well as reading. By creating a pair of glasses which catered for both of these problems, Franklin negated the need to switch between two separate sets of glasses.
Similarly, Franklin's invention of a urinary catheter, which was made from a flexible tube, greatly improved the lives of patients who previously endured an inflexible (and rather painful) rod. (See the first reference link provided).
For more of Franklin's useful inventions, please see the second reference link provided.
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