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Promoted

Lv 7

David E asked in Health Optical · 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

Relevance

Footprintz
Lv 7
6 years ago
Favorite Answer
I don't.
I would say it is a twelve stronger. It isn't a twelfth of anything.
Sulphur
6 years ago
Nope

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