Multiple choice general knowledge

Who invented Bifocal Lens?

  1. Alfred B. Nobel

  2. Thomas Alva Edison

  3. Benjamin Franklin

  4. Rudolf Diesel

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Benjamin Franklin invented bifocal lenses around 1784, creating glasses with two different optical powers in one lens to address both nearsightedness and farsightedness without needing to switch between pairs.