a) Benjamin Franklin

Benjamin Franklin, one of the Founding Fathers of the United States, invented bifocal lenses, a dual-purpose eyewear innovation. Franklin, born in 1706, was not only a prominent politician and diplomat but also a prolific inventor and scientist. The invention of bifocals in the 1780s stemmed from his own need to correct both nearsightedness and farsightedness. Bifocal lenses combined two types of glasses into one, allowing for clear vision at both close and long distances. This invention was a significant advancement in eyewear technology, providing a practical solution for individuals with multiple vision impairments. Franklin’s bifocals reflected his inventive spirit and his contributions to practical solutions for everyday problems.