Kenneth
I don't see how they can do anything that couldn't be done by adjusting the contrast and brightness of your screen. Most monitors are set to blindingly bright and that's what kills my eyes. After adjusting the contrast and brightness I don't have a problem anymore unless I way overdo my screen time, special glasses can't remedy that.
You get eye fatigue because you focus intently on the screen at the same distance for long periods, causing your eyes to keep the same focus and never relaxing, that's why you get headaches for example, glasses won't do anything about that.
Glasses filled with special beer might help.