look at these rainbows i see when use my smartphone camera. i think this is cause of my eye strain because my vision have same problem with focusing image on my screen. anyone know solution for this problem and what its caused by? its pixel structure or what?
monitor 27 1440 240hz VG27AQML1A
weird rainbows on ips monitor
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I think that is moire pattern common to screens.
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Nope. Its an edge of a Matrix, you are slowly entering a red pill world 
Welcome home son.
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Did you know the movie "Johnny Mnemonic" from 1995 staring Keanu Reeves mentions stuff relevant to this forum and other issues with technology?
See scene below:
jokes, jokes, but I suspect that this is the cause of my problems because my eyes react in the same strange way as my phone camera. in my phone poco x3 pro I don't have such problems probably because of the high pixel density and these lines are not as frustrating, but still. maybe it's astigmatism, hard to say. anyway, I'm interested in how this rainbow phenomenon appears on the camera and how this effect is scientificaly called. if the mechanical eye of the camera has a problem with this monitor, mine will have an even bigger one lol
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The rainbows are technically called moire. Cameras have problems with moire on not just electronic screens but patterns on clothing, etc. See: https://photographylife.com/what-is-moire
See the strange rainbow pattern on the left side of the image, as well as the wavy pattern visible on the right side? That’s moiré for you, at its worst. Moiré is almost never seen in nature, but can be commonly found when photographing everyday objects – you might see it in all kinds of fabric (jackets, shirts, towels, and curtains), straight hair, architecture, etc. You might have even seen it on your television.
Do you get eyestrain by looking at moire producing shirt in real life? Do you have trouble with repeating patterns like stripes or window blinds?
After stumbling onto this site about a year ago, I learned and still learning how to measure various aspects of my screens like pwm flicker, temporal dithering and pixel flicker, color spectrum to try to find other potential contributors to problems. I'm still learning about screen "VCOM". See this discussion.
The pixel structure is important such as OLED versus LCD. However, I would try to investigate other aspects of your screen as well. Expect no simple quick solution and any so called "solution" probably needs to be personalized to your situation (including state of health, environmental lighting, and so many other things). At the same time, their seems to be general guidelines on what a better safer monitor and computer might be (list1 and 2, list3) with some current disagreements.
I personally prefer higher pixel density as dithering effects "may" be potentially reduced. I'm ok with 4k at 27 inch at 120hz refresh rate or above so 1440p is a bit too low resolution at that size of a display. Have you tried using a smaller screen with high pixel density (based on your experience with your phone)?
I've posted this link before:
https://forums.blurbusters.com/viewtopic.php?t=6799
The important job is to make sure FRC/temporal dithering is below the noise floor of human vision. Also at high resolution, FRC pixels are so fine that it's almost like invisible spatial dithering instead of temporal dithering. Also, FRC is dithering only between adjacent colors in the color gamut, not between widely-spaced colors (like some technologies such as DLP has to).
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Do you get eyestrain by looking at moire producing shirt in real life? Do you have trouble with repeating patterns like stripes or window blinds?
yes man. thats my biggest problem my whole life, when i look at stripes i see so many distortion things in my vision, huge eyestrain, head pain etc. is there any disease that can cause something like this? thats why i need highest ppi monitor possible because seeing pixel makes my head wanna explode. i have exactly same problems like my camera lol
i actually use aoc monitor 23.8 inches with 1440p and its so cool to my eyes but now i use this asus tuf 27 inches 1440p and i can see pixels and its weird for my eye and a lot pain i feel. definitely 4k should be at 27 inches for less eyestrain. i need to use 175% dpi on 27 inches 1440p for comfort vision xD