Quote:
Originally Posted by Pajamaman
No, 10" in landscape is optimum to read full pdf for me. 7.8 is doable.
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Quote:
Originally Posted by ottischwenk
Do the same with 7.8 and hold the device at a distance of 76% - then there is no difference.
And that can be proven physically.
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For most people, their comfortable reading distance (the Harmon distance) is 30 to 36 cm so holding their 7.8" device between 23.4 and 28.1 cm away is not going to be as comfortable.
For me, my reading glasses are such that when my eyes are relaxed (for normal vision, that would be focused at infinity), the actual focal distance is 34.3cm. Sadly, moving what I am reading to 26.75cm means that my eyes are no longer relaxed and focusing on the page takes effort.
So there is a difference and one that can lead eyestrain, headaches, etc.
See presbyopia.