Heard this mentioned a lot but no idea what it actually does to those affected?
Most people it gives migraines of various kinds, mostly headaches and eye pain. Some people get digestive problems and some get vertigo as part of atypical migraine symptoms.
I've gotten "atypical migraine seizures" that fry my ability to process language of any kind. I won't understand what someone says to me, can't read, can't talk, can't write.
With my iPhone 11 Pro and 14 Pro Max I'm not getting painful headaches too badly. But there is some discomfort. But whats very concerning is that, as was the case with my 11 Pro a couple of years ago, I'm losing my physical coordination. I'm tripping over my own feet and staggering a little at unexpected times and crashing into things. My speech has gone a little wonky, as in I'm suffering from aphasia.
My concern is at least two people have learned the neurological effects can become permanent. One person posted that they were diagnosed with permanent damage resulting in a persistent permanent headache that medication can dull only temporarily. Their condition can be caused a virus or a physical injury, but that wasn't the case for them. Somehow their neurologist determined it was damage from the brain coping with whatever the hell Apple's displays are doing.
I used to think it was pulse width modulation, but temporal dithering may also be a problem and now someone else did some research and said it's the nature of the OLED displays Apple favors to be more harmful than the AMOLED displays other manufacturers use. I am keeping an open mind on all of this, because there isn't, as far as I know, any peer reviewed medical research and certainly not anything specific to Apple products.
Basically there are a bunch of us on a couple of MR discussion threads reporting our personal experiences with different displays and our different doctors visits. It's not sufficiently scientific but it's all we've got.
I've cut down device use a lot. I'm limiting myself to an hour of screen time a day. But for holiday shopping I had to be on my iPhone a bit for Black Friday and now Cyber Monday. It's not good.
Right now I'm posting from my S22 Ultra. I wasn't feeling good after using my iPhone for shopping. But now that I've been on the Samsung for awhile I'm feeling better.
In case anyone is wondering, Apple LCD phones aren't the answer for me either. I don't know why, because I'm on a wait list months long for various doctors but I get a flicker at the edge of my left eye's vision that's badly aggravated when I use LCD displays.
I am trying to reorganize my life so that I'm not on any displays unless necessary. Before I go totally Amish, I'm going to try options like Kindles and accessibility options that help blind people navigate sites like this one. And I'll see if AMOLED is in any way something I can and should switch to full time.