Multiple choice general knowledge science & technology

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 in the 1780s to correct both near and distant vision in a single pair of glasses. As he aged and needed reading glasses, Franklin grew tired of switching between two pairs and cut lenses in half to combine them. This practical invention remains in use today. Nobel is known for dynamite, Edison for the light bulb and phonograph, and Diesel for the diesel engine.

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