The only advantage of having so much white is that it's pretty much all black when you invert colors.
Setting triple click home to invert colors and using it often is probably the most effective way of protecting your eyes.
And yes, you can physically feel your eyes relax. trying to read light grey text on a white lit background is like trying to read the wattage writing on a glass bulb while it's lit up.
You mean kinda like how books have been, since, the invention of printed text?