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I read an article recently that said computor monitors emit positive ions.
Positive ions can cause eye irritation and headaches in a lot of people.
Apparently negative ions are beneficial but they are attracted to and stick on the screen.
Positive ions, on the other hand, are attracted in the opposite direction - to you.
I don't personally suffer by sitting in front of a screen for hours but I know many people do.
I wonder if our hand-held e-readers affect us in the same way?
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