Multiple choice general knowledge science & technology

Who invented the bifocal lens?

  1. J J Thomson

  2. Ben Franklin

  3. Benjamin Franklin

  4. Rene Theoplhie
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Benjamin Franklin invented bifocal lenses around 1784 to address his own vision problems. The design allowed for both near and distance vision correction in a single pair of glasses by placing different lens powers in the upper and lower halves of the frame.

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