Human eye chromatism is remarkably constant, our eyes focus blue about 1.5 diopter stronger than red. So if a computer alternates color of text against black (important) background, you can have some exercise for eyes at the same time while you're shitposting. (You also might want to add something non-readable of opposite color (to text) so total light flux remains the same; I think boxes around letters, or text underline would be good. I also tried a method where one color channel is blurred and the other is sharp, but the result looks very bad)
I implement a sample in a QtWebkit, but many sites don't work well in that minimal browser. Probably more practical would be to extend Reader plugin for web browsers.