Win 10 screen way too bright, can’t adjust

You should have adjustment on the monitior its self or use night light in widows that does it with 1 click

If you can tell what monitor you are using someone may be able to help navigate the adjustments for it.

peace
wanna

Brightness adjustments using Windows settings is usually limited to laptops.

External monitors attached to a PC have their own settings buttons.

Make+Model > your search engine will be your friend

If you've had eye operation(s), avoid quick fix solutions like tinted screen covers, unless suggested/recommended by your appropriate health care professional.

DavidA23 said:

Thanks for your suggestions. I did consider the monitor settings but since I haven't touched their settings since I first installed them and since I've been adjusting Windows settings lately I thought it was unlikely to be the monitors.
Oh well, I've adjusted the monitors and set most things to dark mode so I guess I'll live with it even though it's far from ideal. I'm now wondering what's happened to my eyes.
Thanks.

You might also want to check the Nvidia Control Panel settings...

Another option that gives more flexibility, depending on what suits your eyesight, is to use light mode, with appropriate colours for window backgrounds, frames and titlebars.

You can pick the shades to suit you:



The comments above are all included in the relevant tutorial - from the huge searchable Tutorials section:
Adjust Screen Brightness in Windows 10

Check your graphics control panel and ajust brightness and gamma.

One other possible solution is here:

How to reduce laptop brightness below minimum?

Or if you want automatic adjustments:

Download Gammy - MajorGeeks

Check your graphics control panel and adjust brightness and gamma.

One other possible solution is here:

How to reduce laptop brightness below minimum?

Or if you want automatic adjustments:

Download Gammy - MajorGeeks

FYI:

How to Open Nvidia Control Panel