I never thought I'd contribute to this thread, but here I am... Having used the 13 Pro Max for just over a week (arrived launch day), I've been experiencing horrible eye trouble for the last few days and struggled to pinpoint the cause.
I've had OLED iPhones before and never had any noticeable trouble, but there's something about the 13 Pro Max's ProMotion display that my eyes seem to hate. I've had horrible dry eyes, eye strain and itchiness that set in after about a day's use and it got progressively worse until yesterday. I realised that the only recent change was my new iPhone!
Reading through this thread, I've seen lots of discussion about the various PWM frequencies across the OLED iPhone models, how different people have different sensitivities, and wondered if the higher 480Hz frequency of the ProMotion display was causing me issues. As of this morning, I've been using the 13 Pro Max with 'Limit Frame Rate' enabled (capping it at 60Hz). Much to my disbelief, my eyes have been so much better today! The burning is gone, the redness has subsided and they're almost back to normal.
I impulse bought a pink 13 and just got home from collecting it. I'm going to try it out for the next few days and see if it's any better. I was already considering returning the Max because I wasn't getting on with the size and weight, but (if true) the ProMotion eye strain is an even greater reason to make the switch. Plus, although Sierra Blue is lovely, I really prefer the gorgeous pink of the standard 13!
I'm curious, has anyone else noticed worse symptoms with the ProMotion displays? I'm done upgrading annually and want to keep my new phone for the next 2-3 years minimum, so I intend to use the return period to its full and ensure I've got the right phone for me!
Edit: It's going to be harder to downgrade than I thought. I really love the big screen of the Max! I'm going to use both phones for a few days before deciding. I was also suffering with a cold/flu this week, so I wonder how much that affected my eyes...
Edit 2: I took another day (and night) to give the Max another try, and compared it to an old iPhone 8 I've still got. The Max is going back, but so is the 13! I'm beginning to suspect that I've long had OLED-related eye strain, but the 13 Pro Max is particularly bad for my eyes. And it's especially intense in the dark with dark mode enabled. I think it's because of the modulation intensity? Not sure if I've understood the right terminology from this thread, but I think it's the way it fluctuates brightness between almost 0% and 100%, despite having the higher PWM frequency.
However, I think I've always found OLED iPhones to be hard on my eyes and just ignored the issue until now. I've never had trouble with LCDs; my PC monitors and TV are flicker-free LCDs and my eyes love them. I think it's about time I valued the same comfort from my phone.
So I'm doing the unthinkabable, something I've seen many here do... I've ordered an iPhone 11 (256GB Purple)! These last 9 days with the Pro Max has given me time to re-evaluate my priorities. I love gadgets, but my health and comfort is far more important than fancy features. The 11 is still an excellent phone and it costs less than half of what the Max was going to cost me (on finance)!
I'm thinking I will put the money saved towards an Apple Watch, and possibly an iPad in the near future. Gotta get a good iPad while they're still LCD-based...