Hello, is it possible to reduce it even lower than the lowest possible default value is? It’s still too sharp for my eyes.
You should be able to lower it with the setting on the monitor as well as the settings within the OS itself.
There are those 2 buttons on my keyboard, it’s at 0, but still killing my eyes, that’s it 
If you were changing the settings correctly I would imagine your screen would be completely black.
You’re generally not allowed to turn the backlight completely off.
Damn, I hate white color, it’s the most intense of all. If I could replace all white with a darker shade then I would.
Is your room well lit? That might help your eyes. I can’t take whites on my monitor if its dark in my room.