[trilinearnz]

As others have said, increase the size of your text / OS DPI scaling value.

If you're reading a web page or coding, use the CTRL+mouse wheel shortcut to quickly zoom in and out to suit your viewing preference at any given time. I also frequently adjust the font size of the many notepad.exe instances I usually have floating about. The important thing is making the computer work for your needs, rather than trying adapt to the computer.

Alternatively, I've had good results by reducing the screen resolution, as counter-intuitive as that may seem. I always used to deride my Father for doing this, but now, in my mid-30's, I see his point.

Apart from that, try moving the screen away from your eyes a bit more, and try having your f.lux equivalent enabled throughout the day.