Quote:
Originally Posted by avshadler
40 cm is good for hand held reading of 10 point type . When the reading distance is decoupled from the need to hold something in your hand -- and the person is looking more in the forward direction than down, the average measured chosen reading distance is greater than 50 cm for the equivalent of ten point type.
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That has to be for people with at least average vision, not needing glasses, i.e. their focus has good accommodation. Also with a particular contrast, clear font, and good lighting.
It's simply not generally true.