[MarjaE]

It's not that higher is better or lower is better. It's that certain frequency ranges can screw with the brain.

Most conventional screens stay at the high end of the range, or above it. Though ux/ui animations such as blinking cursors are often in that range.

Common e-ink usage is at the low end of the range, or below it, but the combination of newer faster e-ink displays and animation can run right into the middle of the range.

Now people with similar symptoms to mine often report that e-ink monitors helped them. So I suspect it's a combination of factors involved. I think e-ink tends to help with these symptoms because it is grayscale instead of color, because it reduces brightness and glare, and so on. But it does tend to flash more. And I need to avoid flashing in or near that 3 to 30 hz range. P.S. I find e-readers definitely help, and an e-ink tablet definitely is easier than a conventional one, though certain apps are awful because of rapid flashing.

An older e-ink display which can't get much more than 1.5 partial refreshes per second may be better for me than a newer one which can get 15 per second.