I don't find it easier on the eye. Less light to bother your mate perhaps.
Do you folks prefer to use the "night theme" when reading in the dark? Is it really easier on the eyes? Thanks for the input!
Hate the night theme in the Reader - alternative readers (FBReader, Aldiko, even Nook for Android) provide a true black background with choice of text color (e.g. blue or green) that is much easier on the eyes than the Reader's only optionn of white on a too bright gray and doesn't bother my wife while reading in bed with lights out.
I have tried using that setting and at least for me it bothers my eyes after a half hour or so. I have power saving mode turned on all the time and I really never have to change my screen brightness unless I am in direct sun light.