David E asked in HealthOptical · 6 years ago

If you are an optician, do you refer to the difference between 2.25D and 2.37D as a twelfth?

2 Answers

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  • 6 years ago
    Favorite Answer

    I don't.

    I would say it is a twelve stronger. It isn't a twelfth of anything.

  • 6 years ago

    Nope

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