I keep brightness low as well (and have since forever), but still have eye strain (and have possibly developed some eye issues) and dry eyes. Supposedly, it's

I keep brightness low as well (and have since forever), but still have eye strain (and have possibly developed some eye issues) and dry eyes. Supposedly, it's important to keep blinking regularly as well, which I think I do too. I guess the only option might be to switch to no-backlight screens (eInk or LCDs with reflective screens), but they are pretty expensive for an experiment in any decent size.