Apologies it's actually the Sony x850g that looks promising but the x800h also has low contrast of 1150:1 and extremely low input lag. Would be good if anyone has these TV's to share their experience.
What works for you, what do you use now without problems?
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I wouldn't risk the X800 or 850 after having xe9005. OLED isnt that much more expensive then this TV I have just checked. If you buy any display imo you need to buy it at a place where you can return it.
I think you would be better of trying a 43 monitor with IPS, 1000:1, flicker free and W-LED anti glare matte 3h - those are the stuff my monitor 24 has and its night and day vs TV when im on the monitor my eyes fell normal/relaxed I dont think about it.
You cant get 3h surface on any TV, u cant get truly flicker free (even sonys has some flicker/woble at low level backlight leves and I always use low brightness) also I always turn off all the shitty stuff TVs has like contrast enchancer, cine motion bla bla but I feel theres still some image processing being done there... Good monitors are usually very well calibrated while TVs colors calibration are quite shitty 
Moniotors were always better/no problem for me and problem started on 4k Tvs so I think trying out a monitor 43 is a good idea I know its smaller but if it works it wont be a huge issue.
As for TVs I would only try OLED. If you try anything update
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DiscoDave I dont use smartphone but old Nokia phone so screen doesnt matter Im just using it to call.
As for the X850g on rtings it says 799:1 but on other revievs they sometimes hit 1152:1 value so I don't know... also ONLY that could cause all that pain hm... I compared this to my XE9005 and besides it they are almost the same althrought xe9005 has much better picture quality, im using it at 9/50 brightness and then it's flicker free. But maybe u right and that contrast ratio kills it for me.
What could you worry about X850G is the precalibration settings rated only at 6.4 which is quite bad... for example my xe9005 (aka x900e US ver) has rating of 8.3 and rtings says:
"Out of the box in the 'Custom' picture mode the calibration of the TV is excellent and could be used without any further adjustments."
And in fact I can tell I always liked the colours of this TV, movies are awesome and when I rotate camera in for example MGS V it looks super smooth. This can be important same as contrast ratio because with poor precalibration you can have similar problems
Hm atm im starting to think that maybe the coulpe PC games which gave me problems on this TV but didnt on monitor 24 will give me the same on other TV/larger screen because it can be couple of factors triggering it for example those games were Sniper ghost warrior and sim racers like assetto corsa all much FOV-related games so maybe on bigger screen my brain can't handle it...
The only thing that gives me some deep thinking is why on 43wd750 I could play all games on PS4 no problems but at 4k tvs I couldnt use PS4 no more with any games but I can with most of PC games... thats a killer. Maybe like some people said in this forum one PS4 update killed their PS4 usage so maybe its my case too... It all started for me in the era of HDR support.
Again probably without trying a 43 monitor I won't know for sure it would be most similar to my 24 monitor in terms of spec.
I'm truly stumped at what it could be and it's frustrating that I can't do a simple thing as watching the TV. I know when buying a mobile it's definitely contrast ratio as I've bought and sold so many. I was convinced it was pwm flicker but had some TV's and mobiles that are pwm flicker free and because of the contrast I had to sell them. I have an Xbox one X and I turn off the hdr support as the color pallette is too garish for my liking. Could it be resolution? I have 4k TV and 1080p upscaled seems to pull at my eye balls more. Is 4k too much detail for our eyes? This all sounds ridiculous but I'm losing my mind.
DiscoDave Maybe you know this, but maybe not: first you need to make sure the device you connect is usable for you. I don't know about the Xbox One. A few of us agree upon the PS3 is a usable console (for most games at least).
The chain "device - display", and in the case of PCs, "OS - driver - GPU - display" must be perfect at every link.
If you have a device you have trouble with on a known-good display, chances are it will be unusable for you no matter which LCD you try.
I think I'm fine with the Xbox as been using it on my old Samsung eh5300 with no issues and my Sony has a cheap 32" bush TV and it's very comfortable to look at and play on with his Xbox one. Is your Sony xg800 comfortable to view or do you have issues?
https://pcmonitors.info/articles/factors-influencing-pc-monitor-viewing-comfort/
This is an interesting article that explains many of the factors contributing to eye strain. Contrast is mentioned and also pwm. I just used my android phone camera at shutter speed 1/4000 to find out my TV has flicker unless it's 100% backlight. So now I'm setting it at 100% and see how my eyes cope. My TV is only about 300cdm anyway so hopefully is still watchable tonight when it's night time.....fingers crossed 
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I think the most important factor is not using too much brightness for a given environment. My eyes were bothering me as daytime changed to nighttime while my brightness level still was the same. Once I switched to a night mode with brightness at 3, I've been much better. The lower your ambient lighting, the lower you need to make your screen brightness.
Of course all screens may not dim the backlight equally well, with some invisibly flickering more than others as brightness is turned way down.
a year later
I saw a couple of Xeon's in this thread. Has anyone tried Xeon vs other Intel CPUs. Do they help make it more comfortable?
TV update for me……I sold my hisense 7120 as it still wasn't 100% comfortable and thought I'd give the LG oleds a go. My eyes don't agree with 120hz and LG had just released the A1 which was a 60hz panel. My worry was that the contrast is infinite but thought I can boost the gamma and lower the contrast if needed. After many hours/days of adjusting I have settled on the following setting and I will now see how it goes over the next few days.
I changed gamma to 1.9, used film maker mode which turns off most artificial settings and turned off all motion settings like soe etc. The colour temp defaults at cold 20 and after going backwards and forwards with warm settings I just feel that cool 20 agrees with me so kept it. Sharpness down to zero as artificial sharpening causes strain. After viewing this set up for days there was something still not right. When I viewed pictures with small items such as a crowd or football players it felt fuzzy and felt it "pulled" at my eyeballs and I would start to feel pain at sides of my eyes. I then continued to play with the settings much to my wife's annoyence. I then went into the fine tune option and turned down the luminance on every colour (red, blue, green, cyan, magenta and yellow)to as low as I could (happened to be -30).
I now find the image is much clearer, smaller items aren't fuzzy anymore and the image feels "flatter" which may sound boring but I find it comfortable so far. It's early days and will give it a few days and report back.
If anyone as the LG A1 oled then I can list my detailed settings if anyone wants to try it.
I also still use my Honor 20 mobile phone and find it amazingly comfortable as it PWM free and contrast ratio of less than 1000:1
Hope helps anyone.
Yeah …had this mobile for about 2 years now with no issues. I've had problems with many mobiles and find that as long as the contrast ratio is under 1000:1 and no pwm then I'm good. I use notebookcheck website for every phone review as they measure pwm and contrast ratio.
DAVEGEO When I viewed pictures with small items such as a crowd or football players it felt fuzzy and felt it "pulled" at my eyeballs and I would start to feel pain at sides of my eyes
Sounds like a binocular vision deficiency. Pain in the side of your head around the temples is your brain trying to physically move your eyeball forward or backward to change where it is focusing. The "Pulling" you feel are the muscles attached to your eye (The superior, medial, and lateral rectus muscles) doing the same.
Your brain is falsely intepreting your vision as unbalanced, and so is trying to compensate by moving your eye back and forth to regain balance, just like a camera lens on a digital camera moves in and out when trying to focus.
22 days later
This site doesn't work for me any more. Too much animation.
I've tried a number of computer monitors and conventional tablet screens. At best, I have to set the brightness and contrast to the minimum. I often have to tweak other settings to get far enough below the minimum. I often get visual distortions anyway, as well as reflections from any other light. At worst, I can try that, but it still gives me a migraine.
I've also tried e-ink devices with much better luck. It may take some tweaking, and choosing e-ink friendly apps, but it can be much better for reading. But I can't find a way to stop the blinking cursors in Android, so it isn't much good for me for note-taking, editing, or writing.
I've also tried using my tablet for screen mirroring, but it's too small to be very helpful. There are larger 13.3" and 25.3" devices, but they are much much more expensive.
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Ananiujitha At best, I have to set the brightness and contrast to the minimum.
That may be spectrum-related. I suffer from the same problem, plus I can't use any LED bulbs. What helped me is a quantum dot TV. My AMOLED smartphone is similarly usable. I'm just talking about the brightness issue here, not about flicker or temporal dithering, which IMO are separate issues. If you want to be able to look at a display at regular brightness, you may need to look for RGB spectrum which is characteristic for AMOLED and quantum dot displays (which have a violet backlight; note that unfortunately some quantum dot manufacturers use a White LED).
Stay away from White LED and the brightness problem in particular may be solved.
You can use tools like Stylus and Script monkey and modify any webpage you want to eliminate offending aspects. My CSS file for Stylus is MASSIVE
2 months later
4 months later
Gurm Finally found another person with a Dell XPS 13 9350 2015 laptop.
The display is INSANELY comfortable right?! I just use windows night-light at around 45% to reduce the blue light, and that is one of the BEST MOST COMFORTABLE looking displays I've ever seen.
It looks so flat, non-imposing, and is so gentle on the eyes.
How would you compare the Dell XPS 13 9350 display to the CCFL Dell monitors that you have?
Are the CCFL monitors equally and as comfortable as the DELL?
7 months later
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I have two workstation in different locations and on two I had problems such as you describe. And on both of them the problem was solved by changing the BIOS version of the motherboard.
I have a theory that this is due to poor compatibility of devices from different generations. For example, you have a 2018 motherboard and you put a 2022 video card into it. I think there must be desynchronization issues here.
In my case, it was too fresh a bios that was not compatible with old cards, so I had to roll back. It's on the first workstation.
The second one had to update the bios to the latest version. And after that my new 3070 worked fine. No eye pain, no graininess in pictures, no bad color reproduction.
UPD: Sorry forgot to mention that this was an answer in this thread https://ledstrain.org/d/1688-rtx-a4000-causes-eyestrain-with-true-10-bit-monitor/32, I just copy/paste.