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People are going blind because they are reading on tablets and phones which shoot light DIRECTLY INTO YOUR EYE. eInk, where light must first bounce before finding your eye, isn't being embraced by everyone the way SCIENCE tells us it SHOULD.
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Originally Posted by Raphi'Elohim
Agreed.
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The OP was actually being a bit sarcastic with the above comment about going blind. Lumen for lumen, there is no scientific difference between direct and indirect light. Intensity is intensity, is intensity. If the direct light is correctly dropped to the same intensity as the indirect light, the former is not going to damage anyone's eyes (any more than the latter will, at least).
My tablets are all about as dim as they'll go these days (with a non-white background when reading). I've been reading this way for several years. No eyestrain, no headaches, no loss of vision whatsoever.