go get your eyes checked - Divisions by zero

Pretty funny! But the reason so many people need glasses is because we spend all our time indoors, reading. People in the past were outside working all the time and they didn’t need glasses as a result.
Is that true? I feel like it simply wasn’t an option, so people didn’t get them.

There are a few ways to have bad eyesight

  • Short sighted, can only focus close up
  • Long sighted, cannot focus close up
  • Poor acuity, cannot see the detail others can see
  • Colour blindness

It looks like most of the short sightedness is caused by lifestyle since it is much more prevalent in places where children spend a lot of time indoors