The double invert trick more or less fixes my iPhone 14 Pro Max. Remarkable effect. Especially in low light. I use the smallest text size, double invert, 25% reduce whitepoint and 20% blue color filter. It used to induce pain pretty immediately, and I can usually use it for hours now.

Really interested in hearing measurements for how the screen actually changes with double invert, apart from the reduced high gamut. My guess is that it is forced the use of sRGB colorspace and avoids some FRC.

There is also a trick where enabling screen recording disables VRR and forces 120 hz, but I didn't try it.

    Any ideas if this would work on an IPad and iPhone 11?

    It's fixed my 13 mini. Also I swapped the display to some cheap LCD and now can use this iphone on 100% brightness as much as I want

    async, are you able to use reduce white point at the same time as double invert applied?

    I'm asking because my 13 mini doesn't respond on reduce white point with this trick. There were no changes in screen brightness at 0% or 100%

        Can someone test before and after with a microscope and a 240fps slomo vid to see if it indeed turns of dithering/frc? If this works I would 100% buy the RLCD modded iPhone 8+ on aliexpress

          Ivan_P it works kinda weird when used together with those options. Makes blacks more black. Doesn't really reduce the brightness here . Should be reasy enough to see on the gray text on the screen when adjusting it.

            jordan I tested. It didn't disable screen FRC. Some colors still flicker.

            But it didn't give any symptoms to me

              And to be clear, I have never seen a screen that didn't use pixel flickering for some colors.

              Even true 8-bit panels flicker. They just don't cause any problems like FRC-powered screens

              4 months later

              webkittempoe Settings -> Appearance -> Turn on Larger Text (the setting where it 'restarts', not the slider)

              Hello! And what does this point look like? I just don't really understand what he's doing. And what you need to include. Please take a screenshot.

                  Botvinic It's in the display settings at the bottom, display zoom. Also duplicated in Accessibility>Display. What that one does is scales the screen to a non-native resolution, it can make things slightly blurrier.

                  So, since I was gifted an iPhone X here which I've been playing with as an iPod, I tried this double invert thing out to see what happens.. interesting.. basically it seems to make all the colours darker. You really notice it with reds especially. I can't say that is an improvement. Just use the greyscale color filter instead.. you can add a button for it in the control center.

                  I've been using it mostly with truetone off. What's interesting is, with it off whites look bluish and when I turn it on, it gets warmer and looks more like my android's white (which doesn't have truetone).

                      6 days later

                      Sunspark It's in the display settings at the bottom, display zoom. Also duplicated in Accessibility>Display. What that one does is scales the screen to a non-native resolution, it can make things slightly blurrier.

                      No, there are two settings. The author talks about accessibility - larger text. This setting does nothing.

                      Yours is here - display - display zoom.

                      So which one is correct?

                        a month later

                        has anyone had any success on the OLED iPhones ?

                          m1ngw I have success with the exact same method using an iPhone 13 mini with an Incell screen.

                          There is a clear difference. When double invert is not enabled I have a familiar burning sensation between the eyes

                            Double Invert has made iPhone 14 Pro (stock LG OLED panel) tolerable for me in the meantime for around 6 months now while I'm still trying to find a better phone. It's still a really bad screen I would never recommend to anyone, but double invert made it OK-ish enough where it's actually a bit more usable for me than some modern IPS devices I can't use at all:

                            (such as SE 2020, Nord N30, OPPO A98 -- all of these give me LOTS of problems. BTW, SE 2020 wasn't improved at all with Double Invert, it was much more effective for the OLED iPhone).

                            Important to note that I'm still on iOS 16.4.

                            The caveat -- and the reason why I'm still searching for a phone -- is that even though it actually improved it enough where it's generally OK for "passive"/mindless use: I can coherently read an article on it if I need to, respond to a short text, take photos/videos, scroll through a social media profile, watch a video, order something online etc.) --

                            The issue is that the moment I try to actually do something "productive" on the device, i.e. something that requires more coordinated/complex eye movements instead of simply reading left-to-right --- such as: Taking notes, thinking about how to respond to a longer text while looking at the screen, moving something to a specific place on my calendar, sorting a bunch of photos into an album…

                            That's where the really strong strain still happens, even with double invert.

                            (whereas these "more productive" use cases are fine on my good devices.)

                            Double invert definitely reduces post-processing on the display though, as if I turn it off, I suddenly notice a ton of extra color fringing and shimmery rainbow-ish look to backgrounds, that are not as noticeable while using the strategy.

                            But of course, it's not a fix. However, it's a surprisingly OK stopgap though if you're currently stuck with an iPhone and none of the other settings worked for you, while you're still trying to search for another device.

                            For reference, I'm not actually sure if PWM is my main problem with the iPhone, because many PWM-free IPS phones also don't work for me, and sometimes are worse (such as the Nord N30)

                              Ivan_P

                              No, but I did try a iPhone 12 (standard) in the past that was really bad for me. Way worse than the iPhone 14 Pro even on an earlier iOS version (a 15 version instead of 16.4).

                              On the 14 Pro, even though it's still very straining whenever I attempt doing anything "productive" on the device instead of just casual browsing — at least it looks somewhat crisp instead of fuzzy, and I can read text and articles on it OK (when Double Invert is enabled) — unlike the 12 and modern Macs.

                              Will reiterate that my 14 Pro is on 16.4 though, and would probably be a lot worse on 17 or 18.

                              On the other hand, the iPhone 12 I used to have was bad to the point where I wasn't able to read any long text as I would constantly lose my place and consistently feel sleepy after.

                              When I had the iPhone 12 and experienced all those issues, was actually before I learned about screen sensitivity and thought I just had "severe fatigue" —

                              Of course, that turned out to not be the case, as I have no fatigue when using a comfy screen like my current TN laptop setup. And I still have the same issues if I try to use an iPhone 12 today, such as my friends' ones.

                              (The only reason why I'm on a 14 Pro now is when I upgraded was still a few months before I realized my issues were connected to screens).

                              iPhone 12 looks blurry despite having around the same resolution as the 14 Pro, and sometimes are uncomfortable simply by being in my field of view (which isn't the case with 14 Pro, the strain stops if I'm not directly looking at it).

                              Note that every single iPhone has a different panel lottery. IIRC, 12 is mostly Samsung and BOE OLED panels, and all 14 Pros (at least early ones) are LG

                                NewDwarf The instructions are at the very top of this thread.

                                Basically stack both the Classic Invert accessibility setting, and the second "Inverted" filter in accessibility Full-Screen Zoom, at the same time (zoom out after you set it so you can still see the whole screen but with the Zoom filter still enabled) —

                                essentially stacking two invert color settings on top of each other which cancel each other out

                                What actually happens though is that this has the effect of disabling HDR in all apps (including system UI elements like the brighter-than-white screenshot flash) — disabling the P3 color gamut — desaturating some colors — and IMO very likely disabling a part of apple's display post-processing pipeline (but not all of it)

                                IMO works best on OLED devices

                                The 14 Pro I've tested it on is also in 60fps mode instead of the default 120hz FYI, not sure if that makes a difference

                                    DisplaysShouldNotBeTVs Thanks. I will learn this approach.

                                    …interesting thing is I don't notice any discomfort by using SE2020/2022 on any iOS version. At the same time I am very sensitive to MacBooks M's dithering. I even didn't think SE2020 have dithering.

                                        NewDwarf maybe you got lucky with the panel supplier on both of your SEs.

                                        for reference the SE 2020 I tried (and hated, wayyy worse than the already non-ideal 14 Pro) came with 17.2.1.

                                        BTW my symptoms trying to use an SE 2020 are legitimately the same as the original post in this thread. Like to the point where I would have used the same words to describe it as they did. Given this, I think it's basically certain that the original poster and I's SE 2020s have the same panel supplier, but maybe yours doesn't

                                        (In addition, @jordan has also had a similarly bad experience with the SE 2020)

                                            dev