Hey there Nadith,
I’m sorry to hear about this eye strain issue that you’re having.
There are a couple of things that you can try out, both in-game and out of the game in order to reduce that type of eye strain.
- Check your monitor settings! For example raise the contrast and reduce the brightness a bit, if possible lowering the colour temperature of the monitor can help. Most newer monitors have an eye health mode as well.
- Avoid playing in a completely dark room and have a low light around you.
- Make sure that you are sitting at an optimal distance from your screen, that depends on the size of your monitor.
In-game now,
- Make the text a bit bigger - right-click the General tab above your chat → Font Size → choose one you’re comfortable with.
- Enable the option “Do not Flash Screen at Low Health” - you can find that Interface → Combat.
- Increase the Contrast slightly, while decreasing Brightness and Gamma a bit. You can locate those options in System → Advanced.
Finally it may be worth in potentially looking into various free eye strain reducing programs, that you can install, and check if they are suitable. Hopefully the above help!