I used good high quality CRTs, and then high quality LCDs. The strain from CRT to LCD is significantly lower that is true. But my eyes got whacked in less than 6 months of using a crap CRT @work. Due to that I need to wear glasses now so I'm a bit more careful about how I treat my eyes.
I was waiting for years for an eInk reader to try it locally before buying. Suffice it to say once I got my hands on one and played with it at the store I bought in within a week.
Before that I tried:
Palm m105, nokia 5140i, nokia n95, eeepc 701, various other PDAs I borrowed from friends and so on.
As for having multi-function devices I believe in the Unix philosophy of doing one thing and doing it well so I'll take a dedicated reader over a multifunction device always.
I often find myself relaxing my eyes consciously when working on LCDs. So that tells me LCDs aren't there yet for eye safety.
Anyway to each his own and my advice to everyone try-before-buy if you can else buy at a place with a good return policy so you can test it. And always take the time to test it since that will reduce issues. Be aware of your body while testing. It helps a lot to know what's going wrong.
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