martin

martin I see! Its very weird to think my nervous system would notice 120khz, but I feel how I feel when I try to use these.

I highly doubt it's your nervous system noticing 120Khz PWM. A good way to check would be to find a "known good" LED light that doesn't cause any symptoms when constantly DC driven and run it at 120Khz PWM with an Arduino.

martin Cant they just stop making this shitty tech? PWM, shitty light spectrum, and expensive anyways. I wonder if it also affects other people who dont notice it and we are actually the lucky ones to avoid it long term.

Apple balanced the aspect of making a flicker-free display with preserving color accuracy. I say we "won the war" with PWM now that more flicker free laptops and such are available now.

          JTL thats a good idea with the 'known good' and arduino. it does seem like there are some leds out there that i can handle. maybe certain colors like a yellow-green.

            JTL if that is the case, why are thr devices still unusable? Dithering, LED color?
            Im taking macushield supplements that should make me as indifferent to blue light from LEDs as 90% of the people who have no issues, but so far not much difference.
            Are you covinced its dithering then?

            Im not an engineer to be easily able to build the arduino test device. Would have to study it and it doesnt seem like a fast task. Thank you for the tip though, goes on my list.

                I recently purchased an iphone 8 plus for my wife. I tried it for about half hour with 100% brightness and night shift constantly on. Did not get harsh headaches, but still feel uncomfortable. I will try to find another time to test it for a longer period of time and report back.

                  Jerry iPhone at 100 is reaaaaaallly bright.

                  Sometimes personally I have it on 0 brightness, Night Shift set to max, and Reduct white point set to 65%, in a dark room.

                      degen iPhone at 100 is reaaaaaallly bright

                      Ow 😛

                        iPhone 8 plus works for me. True tone on, brightness at a lower setting.

                        degen Thanks. Will try it again with the new settings.

                          martin Im taking macushield supplements that should make me as indifferent to blue light from LEDs as 90% of the people who have no issues, but so far not much difference.

                          Careful buying into those claims. Non of that shit has been through extensive testing. I took every eye suppliment on the market, non of them made a lick of difference.

                            Another data point: my buddy has a Samsung Galaxy S5 (older phone) and I was able to use it with zero eye strain

                              I recently got a OnePlus X. While the PWM of its AMOLED screen is pretty bad for my eyes, PWM turns off at brightness 81/255 and above, making the device perfectly usable. High brightness is not an issue. Even LineageOS (Android 7.1.2) is usable.

                              And on my OnePlus 3 I discovered that Paranoid Android (also known as "AOSPA"), a custom ROM, is usable. It has Android 7.1.2 and lacks the color profile options of OxygenOS (Android 7.1 and 8.0) and LineageOS (Android 7.1.2), which are totally unusable on any profile, including default. [Default was fine earlier on Cyanogenmod (Android 6.x) and OxygenOS (Android 7.0 and below).]

                              Which leads me to the assumption that something is wrong with how the color profiles are applied to the video output. Feels similar to the Firefox Quantum and Windows 10 post-1511 builds eye strain. I don't see anything flicker on a camera. Whatever it is, it causes eye strain reliably.

                              In summary: The OnePlus 3 so far had ROMS of Android 6, 7, and 8. Color profiles other than the default one always hurt. Then OnePlus changed something in their Android 7.1 ROM, so that the default color profile now hurts as well. LineageOS seems to have copied that change. The Paranoid Android developers obviously didn't bother at all to implement any color profiles, and the result is: no eye strain.

                              Maybe all of you who had trouble after upgrading their usable Android ROM had their video output changed in a similar way. If you are stuck on an older Android ROM and your device is supported by Paranoid Android, you may want to give it a try:
                              http://get.aospa.co

                                21 days later

                                Hi,

                                I have used Galaxy S3 and most recently Galaxy S5 in the past. Recently tried Google Pixel and Samsung S8 and they both give me migraines and eye strain. This seems weird since both Galaxy devices I have used are AMOLED screens. I've played with the brightness settings, used blue light filter, does not help. Clinging to my Galaxy S5 and hoping it to get some more life out of it.

                                I've confirmed with a camera that the Galaxy S5 that does not cause me eystrain does have PWM. So it seems like PWM is not the cause of my strain. Any ideas or good phones to try? On Verizon but willing to switch to get a modern phone.

                                ensete Me too, have you tried any more modern phones that don't give you eye strain? Google Pixel and Galaxy S8 both do!

                                  Sfrix So Sounds like PWM is not your problem. Have you found a phone that works for you?

                                    rich55 Interesting have you tried Galaxy S5? The S5 was fine for me, but the S7 hurts me eyes and gives my migraines!

                                      Wrightpt1 Did you ever figure out what causes your issues? PWM does not seem to be an issue for me, but something in the S8 really affects me.

                                          Kray Hi, HTC 10 also causes eye strain for me, same exact symptoms. Have you found a phone that works for you?

                                            ryans I did figure it out mostly. It is the color temp diff btwn the room and screen that makes a difference, uniform lighting, and nothing really reflective within peripheral vision. These are things I have learned.

                                            I have a diff problem than most here. I really don't get the headaches. I just can feel the presence of the screen in the form of little muscles giving me a fit around my eye. Especially the outer edges of my eye and where the hinge of my eyeglasses are. I'm getting there slowly, living without any issues. Just need to create a perfect environment in the room that have heavy screen use.

                                            I used the s5, it was awesome. One of the best reading experiences. I think bc of the physical screen surface and that version of Android.

                                            Lastly, I'm getting prk done. I wear glasses but just walking through a room with my glasses on that mixes sunlight with artificial light I get the same eye muscle issue as when using the screen. Seems my eyes are just sensitive to certain types of light and those lights are used in monitors. The edge of eye issue only happens with screens though. My monitor and s8.

                                            Im also getting a kindle eReader. Give me time away from the s8.

                                                Wrightpt1 Interesting, let us know how PRK works out for you. I hope it helps you. Do you still use the S5? I'm afraid apps will stop supporting the Android version or the hardware will fail in the phone and I'll be stuck with nothing 🙂

                                                    dev