brjdenis but it may be better for me to purchase Windows 11 license and do the installation from scratch.
If you just want to try Windows 11, you don't need to pay, it can be used indefinitely without buying a license -- there are some limitations around personalization but it should be good enough to see if it causes eyestrain.
brjdenis Yes win11 is less irritating to my eyes. I did the installation with my win10 cd key. I had: Nausea, dizziness, diarrhea, red eye, Pain in the back of my eye(like a cramp), my eyes started twitching of every source of light, i used eyedrops 5 times a day and it still was very dry.
Now i have normal eyestrain, using eyedrops 2-3 times a day. Still not perfect, but much much better. No nausea and no diarrhea.
You can install without a key and just test it for a few days. With an usb stick it is a very fast installation 
An update. I got my hands on a used monitor, HP LP2475w. And it works great with Linux (Pop!_OS) and Nvidia GT 1030 on DVI cable. No eye strain (no red eyes).
These combinations are also fine:
For some reason, Nvidia T600 is great with DP + Windows 10, but not with Linux, not even with DP->DVI adapter.
This monitor has an 8 bit panel, and should work well with GT 1030. And it also has CCFL backlighting which I know is better for my eyes than LED. The only drawback is perhaps that brightness 0 is still too bright for a dark room.
No need to get a 11 key. I've used the same 7 key on 10 and 11 on the same machine.
Fakir35 Hi, there are combinations with GPU and this monitor that don't work. I really don't know if I can recommend it. I tried so many different combinations and nothing is really perfect. I don't know. And yes, the monitor is bright which is something I don't like. Take into account that it is not only the monitor, but also the GPU that causes eye strain, burning etc.
Thank you for your feedback. I used combination with AMD Radeon 6600 with Asus VG249Q1A (IPS) also Benq Zowie XL2411K (TN), for both of them,results were horrific. Both of monitors caused me burning eyes and eye sting in after looking 15-20 minutes. Besides any problem of i could not find not much a user complaint (maybe i couldnt search many platform) till i discovered this site (at least i feel i'm not alone 
). I dunno know how many monitors should i try?
However, i used my laptop (casper excalibur g650) which screen size 15.6 inch, brightness level is 300 cd/m², coated with antiglare on screen, (IPS Panel) and GPU, GTX 1050 for 4 years. There was no problem with eyes while i spent time more than few hours. But now i can not look more than 15-20 minutes?? and which item cause it? Displays or GPU's?
Fakir35 In my experience it's graphics drivers. There are many configurations which are comfortable for me on Win10/11, but Linux is a no-go. Using XCFE (without a compositor) helps and is usable for me but not nearly as comfortable as Windows.
I can dual boot, use Win11 for many hours, then when I switch to, say, gnome or KDE on the same hardware, my eyes start burning in 20 minutes or so and the effects last a day.
What was your GPU Hardware? I read via forum most of people annoying modern GPU's (like RTX 3060 or similar specs) due to eye strain caused by it but no issue with older technology (GTX 1050 e.g.) i dont get it. Also i got same experience. Now im using RX6600 and i'm in eye strain discomfort with it especially during games but i was no problem GTX 1050. However GTX 1050 is weak for todays games.
brjdenis Take into account that it is not only the monitor, but also the GPU that causes eye strain, burning etc.
I think you may right
Fakir35 I've used Intel UHD, Newer AMD integrated graphics (amdgpu driver). I've used Linux for hours and days on end in the past, but somewhere around 2013 it just stopped being comfortable so I switched to Mac at the time.
Strangely enough, raspberry pi (I think using the fbdev driver) is comfortable to look at for a long time. I might have to see if using fbdev with other graphics hardware works well enough.
Recently I purchased another used monitor, this time with a glossy surface:
Asus VN289H, glossy 27 inch MVA panel with FHD resolution
Running it on Ubuntu, Nvidia T600 and HDMI (via mDP->HDMI adapter). Its looks good. No eye burning. Adjusted brightness and contrast to a lower level as usual.
Running it on AMD RX 550 causes a bit more stress, but not that much.
Im thinking now that anti-glare coatings may also have something to do with my eye burning problem. My old laptop had a glossy surface and caused no eye strain, the U2413 had a semi-glossy surface and caused very little strain.
