Talk:Diopters

Revision as of 10:04, 31 May 2020 by Divenal (talk | contribs) (Created page with "Divenal: Not sure I agree with "cancel each other out". There's probably a more precise term like "combine additively" or "combine arithmetically". After all, +2 and +1 don't...")

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Divenal: Not sure I agree with "cancel each other out". There's probably a more precise term like "combine additively" or "combine arithmetically". After all, +2 and +1 don't cancel each other out, they give +3.

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