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Raac, if you don't know what eyestrain is, then you've never had it! It's basically when your eyes get tired from focusing on text (or anything close). It can happen when you're reading, using a computer, doing embroidery, etc. Many people think that LCDs (backlit text) cause more eyestrain than e-ink (non-backlit text). I guess not everyone is susceptible, but for myself, e-ink is definitely "easier on the eyes."
(side note: when I was in my early 20s, I worked in the copyediting department of a publisher. Everyone in my department wore glasses. They said to me, you will need glasses within 6 months. Sure enough, in six months I found I was closing one eye when to read when I was tired, and I needed reading glasses, which I have worn for reading and computer work ever since.)
eP
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