Why is my iPhone 14 Pro causing headache, nausea and eye strain? PWM Complaint...

I've had this issue for a while now. (about 5 years now) Took me a while to figure it out, and it's not unique to apple; it's any screen utilizing PWM for brightness control.

As an Apple user, Im sticking with an older MacBook Pro, and for phone, an iPhone 8 (still), and will most likely get an SE by the end of the year.

Most people I know are fine with it. My kids, for example, have no issues. Even friends that wear glasses for reading...not an issue.

For those that do get headaches though, there is one thing we have in common; a lazy eye. I have one eye, not that you can tell by looking at me, that is classified as "lazy". This impacts my depth perception, and typically forces my good eye to do all the work. (the brain is good at adjusting). Seeing those hidden images in a stereogram photo for example? Impossible for me. Anyway, that's what I get for not wearing the eye patch as a kid.

That said, please don't take this as medical advice. It's simply my own personal observation, and experience. All I know is, PWM controlled displays do not play well with my eyes.

Symptoms:

Eye strain/pressure (like I'm staying cross eyed too long)

Nausea/dizzy

Headaches/migraines

blurred vision

Recovery: usually takes a day

Remediation:

I just turn up the brightness. Doesn't work all the time though. iPhone 12 for example, doesn't help, and the symptoms described above tend to come on quickly (few minutes).