> If you have ergonomic issues with mostly white screens
...you need to turn your display brightness way down!
Hold a piece of white paper next to your display. Open a window with white background. Is the window/display brighter than the piece of paper? It's too bright.
It depends on the display of course, but just as an example: my brightness setting is at 2 out of 100. At the work computer it's 19 out of 100.