Yes it seems sitting further away dramatically reduces any flickering or strain you might have.
After using the XL2720Z coming from a 23 inch screen, the below points sometimes gave me eye strain.
1.Larger screen size and sitting at the same distance as my old monitor.
2.Much brighter backlight, even at zero brightness combined with the above.
3.Console gaming, with 60hz flicker was usually fine but, playing a game (Star Ocean last hope) with mixed 30 fps and 60 fps along with its graphical style is giving me some serious strain. Guess I will disable blur reduction for that one.
To combat eye strain for myself:
1.Sit an appropriate distance from the monitor according to the size.
2.In strobe mode, setting the brightness by turning off the strobing to a level which feels comfortable then turning on the strobing. It seems even though the screen seems to gets dimmer by strobing your eyes are still getting flashed by the normal brightness, well that's my theory and has helped reduce my eye strain.
Now the thing is i am not very flicker sensitive on a CRT, but it does bother me a little on back-light strobing at 60hz, its gets better with higher refreshes.
I would like to say that CRT flicker is not the same as LCD back-light strobe flicker. The phosphor decaying slowly on screen helps with that.
BTW another positive or negative side effect noticed due to blur reduction is that since everything is so clear during fast motion, especially at high frame rates 120+ it really makes you feel your in the scene and spinning around quickly in a FPS can actually end up making you dizzy!
