How many feet are you from the letter chart at the eye doctor?
Trivia: How many feet are you from the letter chart at the eye doctor?
If you have normal vision, then you have 20/20 vision.
If you have better than normal 20/20 vision, then the second
20 would be less than 20. For example, 20/15. Which means
that you can read something at 20 feet that normal 20/20 vision
can only read if they are 15 feet or closer.
If you have worse than normal 20/20 vision, then the second
20 would be more than 20. For example, 20/30. Which means
that what normal 20/20 vision can read at 30 feet, you have
to be 20 feet or closer to read.
Do you see the common denominator here? 20 feet! Yes, you
are positioned 20 feet from letter chart at the eye doctor.
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