Getting eye strain with my new PC monitors

[Fifteen15]

I bought a couple of AOC 21.5 inch monitors, but having used them for a few weeks, I can't work on them for more than a couple of hours at a time. My eyes start feeling strained so I keep going back to my 13.3 inch laptop which doesn't give me any problems.

So I'm going to sell these two monitors and buy a bigger, single monitor (realised I don't need a dual monitor set up). Are there any specifications I need to look for to reduce the chance of me getting eye strain? Faster flicker rate etc?
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"Pain is weakness leaving the body, and blood makes the grass grow faster...but I'll wear my gear anyway"

[chris-red]

Larger text, chances are you although the screens are bigger you'll have larger resolution and you are further away from them.
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[RhynoCZ]

How's your colour temperature setting? Too much blue colour will cause eye strain, that's why when you set your monitor into ''game'' mode or ''read text'' mode, it reduces the blue colour.
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[NJD]

Glasses?
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[Andy_Pagin]

Go Linux, spindly Windows fonts are bloody awful.
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[Derivative]

I had a similar issue with my AOC's before I adjusted the settings. They were far brighter than they needed to be.

Having said that in the future I think I'm going to focus far more on getting decent kit that doesn't strain my eyes. A few hundred quid now is worth it to save my eyesight in the decades to come.

[Fifteen15]