async Was this tested with night shift and/or True Tone on? I believe someone here determined that these features are implemented by flickering certain color subpixels.

      macsforme Nope. I get wrecked by true tone. Would be interesting if someone with opple can check the different solid colors on their high gamut display.

      One thing is the high frequency flicker, but if the lack of modulation is just the red phosphor and opponency is the problem you would potentially trigger the same type of issue when pwm hits at lower brightness or when scrolling, at a much lower frequency.

        @async doublecheck did you measure with other equip and test on another one to make sure its a valid observation?

          6 days later

          Ivan_P Here are the color filter glasses I use: https://www.amazon.com/GloFX-Color-Therapy-Glasses-Chakra/dp/B073PM1JF1

          Specifically the red versions. I tried the orange and blue versions and they did nothing for me. And all the other varieties of "blue light blocking" glasses I've tried don't help at all either. But it is specifically these red ones which give me immediate relief that nothing else can.

          They don't entirely "fix" a screen, but even when I was stuck with the atrocious 14" mini-LED 2021 MacBook Pro (the worst and hardest to read screen EVER) they at least barely got me through work during that time of my life, when previously I couldn't work at all, so they definitely improve things and very consistently too.

          In addition, they work even better with older screens that "have pretty decent output but still cause eye pain". For example, an old 2014 ASUS T100TA netbook with an AUO panel that does give me eye strain, yet despite that is also uniquely easy for me to read (compared to modern screens where I immediately feel confused while reading) I was able to massively improve with these glasses. Now I can finally use that netbook daily.

          (For reference, the 2012 IdeaPad Yoga 13 with LP133WD2-SLB1 panel is still the only laptop that I am 100% perfect using "normally", it is fully readable and I get nearly zero strain, with no glasses or other physical workarounds needed at all.)

          By the way, many times these color filter glasses even help the real world feel more relaxing too for me, sometimes I use them to simply feel more focused and energetic while just getting some chores done etc.

          I also met someone else IRL with very similar symptoms to me recently, I let them try the glasses, and they said it immediately improved their iPhone 11 which they typically have a lot of problems with.

          In addition, you can use the NegativeScreen Windows app to filter the screen entirely red, which sometimes works even better in combination with the glasses (some laptops benefit a ton from this, some not at all, YMMV)

              DisplaysShouldNotBeTVs thanks for providing such a detailed explanation!

              I'll try those glasses and write a feedback when will be ready 🤓

                DisplaysShouldNotBeTVs I have a similar red filter glasses and i can feel it kind of makes text easier to read (maybe it helps with my astig?)

                one thing i noticed is that if you ever use all red mode + night mode, it helps to filter out the led light at the black area, improving the contrast

                    gatorade185 monochrome glasses by the way can simply filter some flickering light coming from the screen. Overall flicker amount is reduced and it can give some short-term relief

                      Small discovery. When using the XDR Upscale the screen will flicker like crazy when using Flash screen updates for debugging in Quartz Debug. Not entirely sure what it is, but it could be related to the observed blotching that gets activated.

                      The new coming M4 Macbook Pro is supposed to feature the a new video engine A18. You think that will fix this whole issue?

                      macsforme @async few weeks ago I was playing with macbook intel and macbook m3 to compare how dithering looks like under microscope. And I noticed that intel dithering is more soft than M3. On M3 it was more aggressive with some red pixels blinking pretty fast. I will prepare a video and upload here.

                        12 days later

                        I found these settings are the best for me using external monitor via USB-C for high focus work. I know it is a bit weird that YCBCR is better, but I guess it just add noise which helps.

                          Donux ycrb 4:4:4 does not add noise. 4:2:2 does. So don't stress about that. Both are as good, but can be different depending on if using a hdmi cable, and how the monitor processes the signals. There are definitely subtle differencess.

                            I actually take it back. It just does not work, and I can not use it. And it is not screen, it is GPU unit. You can tweak endlessly, its garbage in -> garbage out type of situation 🙂

                            2 months later

                            wlmsn TB = Touch Bar, aka the lower end 13" (the 13" -- not the 14"!) M2 MacBook Pro model with a touchscreen strip above the keyboard (instead of function keys), only two USB-C ports, and no notch.

                            It's the one that has the "MacBook Pro" text below the screen instead of a blank space.

                            (Not to be confused with the M1 Air or M2 Air. It's still a Pro but based off the older Intel-era design despite having an M2 chip)

                                dev