There is a reader where you can switch off the refresh inversion via menu.
There was discussion quite a long time ago, after some firmware update. It does refresh every tenth page turn or something like that, but the result is more ghosting.
I just do not remember what brand it is.
My sony Reader PRS500 has one of the most visible and slowest refreshes. I can tell you from my own experience, that you very soon stop noticing the refresh. Now, when I read I do not notice refresh at all. I know it is there, I just do not see it anymore. Our brain can very, very effectively filter out the noise.
You might go to a shop that can take your purchase back after a week or two and if you are not satisfied and try reading for some 20 hours.
Disclaimer:
Your Mileage Might Vary (Tm)
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