When I first started using my reader, I noticed that my eyes were very tired. I couldn't figure out why, as I was using the same lighting conditions that I normally used for regular paperback books. I tried using larger fonts but it didn't help much.
I finally figured out that the low lighting conditions that were acceptable for regular books were not sufficient for my eink screen. A 10 dollar clip-on lamp solved the problem, and I can now use the smallest font without experiencing any type of eye strain.
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