Anecdotally, I find pure black + pure white rather uncomfortable to look at for any long period of time. (Pure white especially, but the combination of the two

Anecdotally, I find pure black + pure white rather uncomfortable to look at for any long period of time. (Pure white especially, but the combination of the two is particularly bad.) It wasn't always that way, maybe something to do with my current eyeglass prescription, or just fatigue from staring at monitors all day? I don't know. But regardless, one of the things I've learned about UI design is not to dismiss other people's concerns about text readability. Just because you have great eyes (for now), doesn't mean everyone else does too. :)