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Jake S.
Keymaster
Post count: 8739

https://wiki.endmyopia.org/wiki/Frequently_Asked_Questions/Measurement

Above has the answer.  Also worth noting, frequently asked questions and the Wiki search function can be really useful.  

There’s no difference in the measuring as it all just uses 100 / cm distance = diopters.  Results vary only in as far as you determining what centimeters the blur starts at.