A LOT of us have found out the hard way we have issues with how Apple implements it’s patented specs on the OLED displays. This thread is super long so I’d recommend maybe reading the first few pages then skipping to the last few pages, but it will give you an idea of what is going on: https://forums.macrumors.com/threads/eye-strain-while-using-iphone-x.2085427/Hmm that’s interesting. Never had a migraine until I was 54 and now I get migraines with aura. Always seem to be on my phone when they start, blind spots then the zig zags. Wonder if it’s Oled related.
This article is also informative.
The saddest anecdote for me was when a fellow forum member who has never had migraines got so sick he had to go to the ER.
My Pixel 2 display flickers a lot and gives me eye strain but no headaches or seizures. If I remember correctly, Apple goes down to the level of the sub pixels in the pentile arrangement and cycles them off and on in some sort of pattern, too. That makes the flicker worse somehow. Maybe there’s multiple patterns of flickering going on simultaneously. I don’t know. That information doesn’t seem to be publicaly available. Just this bit of information I just shared was in one source I ran across once. I linked to it in that thread but I don’t have it on hand anymore. It was just a few sentences of information in a longer article about other things.
Anyway, I don’t want to derail this topic too much more so I’ll discuss it more in the linked thread when I get my phone.