Comment Re:Only Apple (Score 1) 624
A world of difference.
E-ink, and paper, work by reflected light. That light is scattered, diffused, softened, if you like.
LCD, TV, iPad etc are transmitted light. They are stimulating your optic nerves with a constant intensity.
Stare at your LCD screen for a minute without blinking. Now close your eyes and feel that burn as the nerves drain.
Do the same to a book. The same burn just isn't there.
I know we all blink more often than once a minute, but long sessions have the same effect.
Unless you are reading a book by the light of a small nuclear explosion behind you (closer than the sun), the effect on the eyes of reading an e-ink screen vs an LCD screen is like looking at a lit wall vs staring into a lightbulb.
E-ink also isn't 'hard-edged' but is feathered, although it still allows reasonable high contrast, which is, for reasons I'm not as up on, easier for the eye to deal with.