This is what I don't like about this headline and study. It seems to conflate pretty easily iPads/tablets and "ereaders", because it doesn't look like they only

This is what I don't like about this headline and study. It seems to conflate pretty easily iPads/tablets and "ereaders", because it doesn't look like they only tested e-ink ereaders, but "ebook readers", and many use iPads for reading ebooks. That's how they got the eye strain.