I am still using an iPhone 4. Out of five iPhone 4/4s I bought only two are usable. The three other ones triggered eye strain in just a few seconds. However, the iPhone is getting slower, and the screen size is not really what you use nowadays. Do you have a Smartphone with current technology that is perfectly usable throughout the day?

I use a Note 3 SM-N900W8 (purchased Oct 24th 2013, was having issues with PWM then, got a migraine from being in the store too long :() I never bothered to check for PWM as it was less of an issue in phone displays back then but I never had problems with the display. Recently checked with Canon T5i and it shows up as higher frequency than usual >300hz which is a safe zone normally. And I cannot detect PWM using pen test (insert S-Pen joke here) However Samsung phones made in 2014 and after have terrible PWM worse than this. Friend got a headache from trying the S5 in store, think later batches of the Galaxy S4 may be affected, etc.

I am iPhone 4s with iOS 7.1.2, and it's smooth enough because I don't usually use apps on it. (I surf the web on computer) I think iOS 6 is better on iPhone 4. :>

@"JTL"#p236 I hate Samsung mostly because of the screen. The same feeling as yours.

I've got a LG LGL34C for about a year now and haven't had any issues with it. Dunno if it's fast or not but it's usable... so that's good enough for me!

@"Slacor"#p251 Heh. I had a LG-C55 about four years ago running Android 2.2. Think was laggy as crap but it didn't use PWM, took 10 seconds to open the dialer, etc.

Did anyone try the BlackBerry Leap?

I use an iPhone 4s and I hate it :( It gives me instant eye strain + headaches. Its original OS (I don't remember which one it was) seemed a lot better than the new updated ones. I wish I could revert it back to how it was.. but oh well.

Yes, that is true. I had to downgrade my iPhone 4 to iOS 6 because on iOS 7.1.2 I got severe eye strain and headaches. I switched back and forth several times to be sure. I think there is a newer hack tool that allows you to downgrade iPad 2 and iPhone 4s to iOS 6.1.3. I read about it in reddit's jailbreak section. I believe it is called something like Odysseus. But I can not guarantee that it is safe to use and free of malware. I think iOS 5 was the original OS.

Also I might be able to go to a phone store soon with my fast shutter speed DSLR to test for flickering in newer smartphones. Also people on my family also own, alongside the Samsung's I mentioned. - LG Nexus 5 - iPhone 6s (I don't like iPhone's :P) will test those later.

I tried the BlackBerry Leap now. It is not the worst LED device I ever used, but it still starts to hurt a little after 1-2 minutes. At night the minimum brightness is a little too bright for me.

Usable Smartphones?

zero

Hello guys, I just like to report that the Samsung A23 4G/LTE it's not PWM-Free, if someone is looking for a samsung pwm-free phone avoid this. Notebookcheck says that the A23 5G version is pwm-free but idk how trusted are they right now.

LINK: https://youtube.com/shorts/t5o7bEwN1oo?feature=share

Also can someone english native rate my english pls, thankyou, see ya.

hansennnnn

Last saturday my phone auto update to android 14 since then every day i use it i got eyestrain and if too long i got migraine,is someone else got same experience with me ?

I cannot downgrade my self and i already go to autorized service center but they cannot downgrade it,is there any application or setting to make android 14 to not cause eyestsain and migraine like on android 13 ?

Before i use android 13 with the same phone no eyestrain at all

My friend say this is placebo effect but every day since update every time i use my phone i got eystrain but if i dont use itu eyestrain slowly dissapear and i have one more old phone when i use it doesnt make me eyestrain but it so slow

i read ini ledstrain.org because pwm or dithering,Is there any app or setting to fix pwm or dithering ?

Please sombody help me,because my work is always to use smartphone like WA 🙏

Everyone in here can use android 14 ? Or just me ?

If downgrade it will fix eyestrain ?

simplex

hansennnnn

Should work. You have no choise

hansennnnn

simplex i already downgrade to android 13 yesterday but it still make me eyestrain or maybe because of one week full eyestrain so it take time to my eyes ?i confuse depress,is anyone in here never experience it

is possible the dithering or pwm setting from android 14 still in android 13 ?

simplex

hansennnnn

It can be

But firstly, take a rest for a week. Eye-spasm has big tail: you will blame all "safe" devices

hansennnnn

simplex what do you mean " it can be " is

for because of i got eyestrain for one week so my eyes take time for cure even use "normal" phone ?

for downgrade android 13 is useless because setting from android 14 still there in android 13 ?

sadly i cannot rest my eyes from using phone because from monday until saturday 9 am until 5 pm i need use my phone for work

simplex

I think issue is pixel inversion algorithm which cause pixel flicker to prevent burn or pixel stucking

hansennnnn

simplex is there any setting or application to fix " I think issue is pixel inversion algorithm which cause pixel flicker to prevent burn or pixel stucking " ?

simplex

hansennnnn sadly i cannot rest my eyes

try to use old or safe device to let your eyes relax

simplex

hansennnnn

nope, it is system code which update panel's chip. You need to get root and some knowledge for android core settings

The problem is, for example, your previous 13 android not modify this data, when 14 - does. Thats why after rollback, you can still have eye-strain ( 13 android exist with panel chip's firmware done by 14 android )

hansennnnn

simplex how to make panel chip's to android 13 ? is there any tutorial ?

Do you have experience same with me ? that your phone is safe but after upgrade cause eyestrain,after downgrade still cause eyestrain

if yes what is your brand and phone type ?

yesterday i already ask tehnician of authorized service center that downgrade my phone,he say downgrade make phone like new from the box so he say impossible that some setting from android 14 stil in android 13,he says its like format all of your storage and flash with the old android 13

simplex

hansennnnn ask tehnician of authorized service center

okay

then all you need is take your eyes rest and dont use " bad " screens

hansennnnn

simplex or maybe it is my brain need to adapt because of placebo effect ?

i dont have any phone beside this one, just laptop that i cannot take everywhere

or maybe the tecnician is lie ?is there possibilty to downgrade android but setting from new android still in old android ? any thread about this topic ?

pavelbures

hansennnnn It is quite common that new version of OS brings new animations, new text-sharpening effects etc. And these features can cause problems. The newest version of Android I can stand is 11.

hansennnnn

pavelbures i already downgrade my phone to 13 but still got eyestrain and headache,before that i use same phone with android 13 no eyestrain at all,i think there is dithering setting from android 14 that still there in android 13 even after downgrade,do you have downgrade os and still got eyestrain ?

i think the only way is to buy new phone with excactly same type and make sure not to update to 14 btw all batch of the same type phone will be have the same hardware and same software right ? while i save money for buy a new one,i searching for solution to disable dithering in here but nobody in here know a way to disabel dithering

ensete

My Trust TCL A30 broke, so now I am stuck using a phone that give me eyestrain. It has absolutely zero to do with flicker or PWM or blue light or any of the other nonsense people throw around.

I tried 4 other identical model phones, none of them worked for my eyes. I did a shell swap and still no help so it;s not the screen, it is either the video hardware or some difference in the OS

Just going to use my phone as little as humanely possible while I keep trying to find one that doesn't trigger my BVD. Every phone so far, within a fraction of a second of even glancing at the screen, my right eye tries to focus on something different than my left eye and causes muscle spasms in my face. I can feel my eye moving in and out.

hansennnnn

ensete do you already check android version and firmware version tcl a30 that you can use without eyestrain is exactly the same android version and firmware version with new 4 unit tcl a30 that you have been bought ?if you have swap the screen but still got eyestrain is definitly software problem

ensete

hansennnnn Same Android version (11) but that OS was upgraded, I bought mine when it first came out and never installed the system update, whereas the the one I bought was upgraded

What I am going to do is use the new phone to take diode readings off of so I can try and repair the old phone It stopped charging and was missing texts, so if I can repair it that solves my issue

hansennnnn

ensete i think you must try a new phone with excatly same os and same firmware with your old phone,because even it is a same hardware but if it have a different software it will make difference like eyestrain migraine etc because if some day your old phone got lost,you wont have another solution

ensete

hansennnnn Well, duh 🙂 That's easier said than done

I did do a shell swap and swapped the new motherboard into the old phone body (including screen) and it didn't help. So that proves it is not the screen, it's either a hardware difference with the motherboard, or a software issue (driver or patch level of OS)

hansennnnn

ensete motherboard has storage so it is using the same storage and os,try find new one one market place

edit today i got my new phone with excatly same type dan same os but i still got eyestrain and headache,meanwhile i can use my old phone zenfone no eyestrain at all but so slow and have only 32 gb storage so it is not my eye problem

maybe i think after update the screen a little bit blurry is it from dithering ?i depressss stress,i dont know how to solve this issue,just join telegram grup about ledstrain maybe find something about disablw dithering

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