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					Originally Posted by  schmolch
					 
				 
				Eye-strain is very intense physical discomfort similar to other muscle-pains (muscle-pain always depends on the size and shape of the muscle). 
I can imagine that a dedicated e-reader is more relaxing because of it's single-purpose nature but the pain is real. 
			
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 Asthenopia can occur in varying degrees, just like other other forms of strain/pain, and is accompanied by symptoms that also accompany stress.
P.S. schmolch, don't get me wrong. LCDs (or any source of light) 
can cause eye-strain (very intense in some people) if they are used incorrectly. I was simply presenting an additional point of confusion, which in my (admittedly limited) experience, is another reason people (wrongly) blame LCDs for eye-strain.