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I like the idea of having 2 devices but I am confused over the discussion of contrast and 'easy-on-the-eyes' between e-ink and an LCD screen. Where is the evidence of the long term use of both screens? Personally, though I can use e-ink, I find the text muddled, lacking contrast, and difficult to read. On the other hand I find lcd screens, such as the iPad, clear and bright and have had no problem with 'tired eyes'. Perhaps this is an age issue. I have had many senior citizen readers complain about the contrast of Kindles and Nooks. Is there any research on this? Is age a factor?
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