Water! This might sound a little weird, but I use a nose spray (any atomizer will do) filled with water and spray on my closed eyes when I feel like it. I started doing this this year and it helped me tremendously. No more eye strain!

Before that I tried EVERYTHING!

* Dark Mode

* Night mode (Flux etc.)

* Changing Brightness

* Changing ambient light

* a few different eyedrops

* Looking away more often

* Sitting farther away from my monitor

* Different monitor positions

* Different monitors

* Sitting less in front of a monitor

* Bigger Text

Nothing helped me. I asked my doctor and he couldn't help me at all. Sprinkling some water onto my eyes? It just works.

(I guess my eyes are just overheating or something? But honestly I have no idea.)