Does reading on monitor everyday damage your eyes and eyesight compared to paper or e-ink?

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Should I read on paper only? I've found mixed answers to my question, some studies claim computer monitor are bad for reading long papers and books (which is a thing I do daily for my study/work) and some studies not.
I'm confused: how a monitor can damage your eyesight compared to paper?
Does reading a physical book is worse because of poorer contrast and slouched posture?