I didn’t know what temporal dithering was so I quickly looked it up and came across a mention of it in relation to migraines on the Nvidia forumYou aren’t alone in this weird problem, there’s another thread full of us: https://forums.macrumors.com/thread...r.2150554/page-20?post=28906812#post-28906812
I‘ve mentioned it before, but I think it has something to do with Temporal Dithering/A12 chip. This may only apply to some of us here, but certain people seem to have trouble with a specific range of devices. For example, if you’re part of this group I’m talking about, you’ll get consistent eye strain from the XR, 11, SE2020, iPad Pro 2018/2020, iPad Air 3, any Mac after 2015, etc. (OLED devices seem different, I’ve seen people who have issues with these devices strangely having no problem with PWM flickering.)
Anyway, I don’t know for sure because I can’t really test the screens, but I think Apple started doing something differently around 2016 for Macs and 2018 for iOS devices. Like I said, I think it started with the A12 chip, because we’ve cleared a lot of the other potential causes:
-It’s not True Tone because older devices have it and they doesn’t cause symptoms
-It’s not Face ID because the Air 3/iPad 8th Gen don’t have it and they still cause symptoms. Not to mention I’ve tried covering the Face Sensor on XR, 11, iPP 2018, etc
-It’s not any device setting in Display, Brightness, Accessibility, etc, we’ve tried nearly everything at this point
-It doesn’t have anything to do with the antireflective coating, P3 color gamut, oleophobic coating, etc.
Every device that seems to be causing problems for some of us has an A12 or better chip, that’s the only thing I can see that links them all together. I’m thinking this because my brother let me try his new iPad 8th Gen (which is the *EXACT* same as the 7th gen barring the new A12 chip), and it gives me the same eye strain as the other A12 devices. I could use the 7th gen for hours with no issues, so it points to the A12 chip IMO.
Again, this seems to only apply to some of us. If you only have trouble with just one or two of these devices and the rest work fine, I don’t think you’d need to worry about anything I say here.
On the other hand, if you notice you’re consistently having trouble with XR, 11, SE2020, iPad Air 3, iPad Mini 5, iPad Pro, 2018/2020, any Macs after 2015, etc, I would encourage you to try any iOS device with an A12 or better chip or a Mac after 2015 and see if you have the same symptoms, I think it could be valuable in finding what the actual cause is or trying to figure out a potential solution.
Reading what it is, I can see how it could cause problems since it’s similar to pwm in flashing. Only it’s flashing color values instead of an on-off state.
It’s good to be aware of all these factors that maybe impacting some of us in different ways.