drima55 Well I assumed the same. But all the phones since the X have given me migraines, vertigo, brain fog etc.. ive tried X, Xs, 11, 12 pro, 12 pro max.. and returned them all (several times, from several attempts) but the 13 pro max was fine, it didnt give me a headache once in a space of a month using it every day as main device. (I did return due to brain fog) and that has a low refresh similar to the XS max which was awful for me.

So last week I tried the 13 pro and within a few minutes, I felt a dizzy, went home and had a headache. so frustrating. Ive felt rubbish since. The pro max's effect me less but the small ones with a higher refresh give me the worst headaches. So I think it just varies for everyone. Currently using an iPhone 8 plus lol.. I was hoping the 14 pro max with the LTPO screen would be better but n thinking other wise. 🙁

Have you people tried the "Reduce white point" option? (Simply search in settings for white point)

I got a 13 pro max instead of the 14, so maybe this option is working differently, but for me it helped greatly.

By default it sets to 80%, I was raising it to 90% and cranked brightness itself simply higher and now I'm all good.

This is maybe not related to PWM, but who knows, maybe it helps for that as well. I just hope this can help someone out there too!

    blokes444 is that true about 1040 PWM on IPhone 14? I cant understand how these values were obtained

    tsb This is imo quite likely related to PWM coz when the brightness is set very high or at max on a phone with PWM the "OFF" part of the PWM cycle is much shorter than the "ON" part and this reduces the effect the PWM flicker has on us (even if the flicker isn't completely eliminated). So keeping the brightness slider very high or on max and then using the "reduce white point" accessibility setting to reduce the brightness to a comfortable level as you have done can help if we are sensitive to PWM flicker.

    Some phones (like the 13 Pro Max according to notebookcheck I think) use PWM all the way up to 100% brightness but others have it only up to a lower value eg 62% or 99%. In phones that have it upto 100% it's most effective if you keep the brightness at 100% but on phones that have it only up to a lower point then it's ok to keep it just above that percentage, and then in both cases reduce the brightness using "reduce white point" on iPhones or iPads, or using overlay software like Twilight, for example, on Android.

    • tsb likes this.

    Got my 14 Pro Max device delivered today. Unfortunately for me, the 14 Pro Max didn’t work out as the case was with 12 & 13 Pro max. After around 30-45 mins of usage, terrible eye strain, nausea & blurred vision. PWM all the way up to 100% brightness level it seems… So Regardless of PWM frequency bump for the 14 Pro’s , the issue still persists imo. Maybe different for others.

    Right now SE3 and 8 plus are holding the fort for me. Great LCD displays, of course without PWM, resulting in no issues for the eyes whatsoever. Doesn’t matter how many hours you clock daily on these LCD display devices.

    Tomorrow I will do another test with 14 PRo Max so as to be really sure and if it turns out to be same experience as of today, then I will return the device on Monday with a heavy heart (again like last 2 years in a row). Will update here the findings. I would suggest that please test yourself if you get a good return policy in place.

    It's always worth a try, but the assumption that if one suffers from 240 Hz PWM, 1040 Hz PWM might somehow mitigate the problem may be wrong. The whole idea that there is a nearby threshold at which flicker would suddenly have no effects at all anymore may be wrong. I myself notice symptoms at 20,000 Hz, too. Don't let this discourage you from testing, but keep it in mind if you still have symptoms with 1040 Hz or higher.

    iPhone 14 worked for me, no eye strain or headache. The hz is higher than the 13 is my assumption. Won’t know until notebookcheck releases the data, was told 1080hz is wrong on the 14, my eyes says different lol

      Ok, I give up! I tried the 14P for 2 days and today I feel really really bad!
      It doesn't cause me any eye strain but i am totally disoriented as if I had a fever!

        Lauda89 Hmm… interesting feeling. Maybe iPhone 14/Pro devices began using temporal dithering?

        From my experience, PWM and temporal dithering give different feelings.

        Lauda89 can I ask was it worse than your experience with the 13 pro max?? I’m trying to work out if it’s even worth me trying.

        Did the 13 leave you as disoriented as the 14?

          Keye21 I never tried the iPhone 13.. Because the iPhone X was an amazing phone, I can use it for 4+ hours per day with zero issues! So I've never tried to change the phone during the last 4/5 years!

          I haven't used iPhones in many years now but my mom has an iPhone X and I confirm what Lauda89 says that it's fine in passing. Though I remember when it first came out I didn't like it, so later system updates helped a bit.

          I would suggest making the font bolder (it's a setting in display & brightness). Apple changed the system font over the years to a thinner more spindly one, but I know I need more. In my e-reader I tend to lean toward fonts that are "Medium".. medium is the weight between regular roman and bold.

            tsb reducing white point made it worse for me, left it as is and at about 85% brightness

            I wrote an inaccuracy--the company phone is a samsung A52S ( I forgot the "S" in previous posts), and it is still a 120hz OLED! The PWM is low 230hz like the iphone X and the pixel 4a, so maybe i like the low frequency!

            Thanks for the video, It seems users back east are move interested in pwm rate for their devices. The owner of the video stated he may do English subtitles soon.

            Sunspark Hi, are you still using A70? I am still using it with Android 9, but the company i work for is providing a allowance for a new phone. I was thinking to take advantage of it.

            So for you, iPhone X is usable for everyday office work?

              Peter Hi, yes, still using it w/ 9. I wouldn't mind a new camera, but at the same time, this device is pretty great for me.. very stable, I have everything set up nicely. I could see myself continuing to use it another 2 years as-is. I'm glad I got a good case for it, because I've dropped it a few times.

              The X isn't my device, but yes you could use it especially if you put the brightness at 50% (and I also tend to be around there or a little lower/higher on the A70 too). The thing is though, even tho it's still supported by Apple, it's also now 5 years old.. so the camera would be 5 years old too.. I don't know that it's worth the bother.

              I also don't know why people here are so into Apple.. it's a walled garden that is locked down. On Android I can do whatever I want.. I can sideload apps, I have a file explorer, I can use video containers like MKV, I can use different web browser engines, I can change the icons, etc. etc.

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