Thank you very much! Couldn't find Optrex in my country but ordered a good brand of moistruizing eye water. Windows 10 night light also works better than anti-blue light indeed, might upgrade to 11 for strength control. Perhaps i should also wear sunglasses lol! Could you guess the source of it? I used 60hz 1080p panel of Y520 for years had no issues at all. But it was quite dim screen perhaps my eyes got lazy and sudden brightness change was too much or perhaps it is flickering. I might even change screen of my nitro 5 if there is compatible panel. When i search online i see so many people complaining about this issue Acer should take much greater care about it and offer different screens to customers i think.

Omg, this explains why 144 hz was so painful for me i literally felt like my eyes were burning as they got hit by high beams not once rather 144 times a second! Forcefully reduced refresh rate to 40 hz now and it is so much better than even 60 hz. An515-58 screen failed to work below 40 hz, good thing i tested it first lol. During gaming it is really not this bad, spent 2 hours on cyberpunk yesterday no eyestrain and only sun light was bothering me as it was highest luminance source. But while surfing that white luminance is just torture, like trying to see behind a flash light. I wish we had access to led lamp controls and directly reduce luminance by changing power. My screen is shown as ''BOE0B02'' and it doesn't even exist on panelook, perhaps it's actual brightness is even higher. I really liked everything about this laptop but screen was a total disappointment sadly, seriously considering replacing it.

I tried moistruizing eye water first time yesterday it was a great relief, thank you again! Apparently win 10 also has strength control but night light gives temporary relief not fixing my issue. I managed to find out what it is and reduced it greatly. Even if it isn't entirely gone it is nowhere near bad as before. I will explain what it is.

I will explain what is my problem exactly so we can all isolate the issue, for example take a white paper with black fonts, there isn't much luminance difference between white paper and fonts while it feels natural and easy to read, right? Now place same paper in front of a white LED light and try to read it again. Now because white is illuminated by LED light it is so much harder to see fonts and reading gives trouble even headache in few minutes only, right? This is exactly our problem that in our screens white luminance is so much higher than colours and black it is tiring our eyes to read and giving us eye strain eventually. This could be because of a defect because all panels can't be produced in same quality which is why they need to be calibrated. It could be fixed by calibration perhaps or it could be us that we aren't used to it while high refresh rate is making it worse. But im an engineer who spent half of his life infront of screens i didn't even know i could get eye strain from a screen, never happened before. So sensivity is at least likely canidate here i think, especially if we consider this panel is quite cheap indeed.

About how i significantly reduced it, changing brightness reduces brightness of everything not just white so there is still significant difference between white and colours and black so it gives temporarily relief but if you keep reading eye strain returns not long after. Same goes for changing colours and making white yellowish aka ''softer'' but in reality IPS panels can't reduce blue light alone rather increases green and red to give yellowish colour which means white luminate is still quite high. I noticed gamma setting increases while luminance more than brightness setting so to reduce white luminance alone i reduced gammas greatly and make up for brightness loss with brightness increase and colour loss with digital vibrance. So at the end i got a dimmer screen with like 30% reduced white luminance while 10% colour luminance and the severe difference between them got lowered.

It isn't perfect and colour accuracy is out of window but at least white is actually much softer now and not giving me same level eye strain anymore. Perhaps i would send my laptop to service for colour calibration if you think it might work but i wish Acer offered different screens really, i would gladly pay 100-200 dollars more and get better panel with much better colour accuracy and brightness levels..