Originally Posted By: wfaulk
Optometrists constantly deal with people who have eye problems due to computers, to the point where they came up with a term for it. But I, at least, have never heard of Book Vision Syndrome.

The end of that article hints it's possible from a non computer source too.
Originally Posted By: Wikipedia
People who are engaged in other occupations—such as tailors engaged in embroidery—can experience similar symptoms and can be helped by these glasses.

It seems to be a problem with focusing on one thing at a fixed distance for too long. Desktop computers, especially with large monitors are likely to contribute to it due to the stationary nature of the display. A laptop/ebook reader/tablet is going to likely be moved, along with being small enough that people look away from time to time.

As far as the general eink vs LCD debate, I'm not sure what way to go. I'd have to try reading a book on my LED lit LCD laptop and compare it to the Nook sometime.