[Timboli]

Well the way I understand it, is the light mostly shines on the text, and not so much through the text at your eyes, so heaps kinder to them.

You can also adjust the brightness (as in turn it up) to counteract any reflection that may be occurring, especially out of doors, which varies with location and cloud coverage. Even indoors, with some types of overhead lighting or window location, you may need to counter reflection.

With my Paperwhite, I mostly have the brightness turned down low, trying to approximate the look of a book page, not a screen ... especially in the dark. Environment is often the governing factor though.