TL😃R; I can use a 5ms response time monitor, but not a very similar 2ms response time monitor with intel integrated graphics via vga.
So I've had a nagging problem for a few weeks now. I can use my office computer which uses intel integrated graphics from an i3 6100 but I get strain from the integrated graphics from my 6600k when I tried to use it at home. The office computer is hooked up to two benq BL2211 monitors via vga. The home computer uses a pair of benq BL2405 monitors, normally driven from a GTX660 that's always been perfect on my eyes. Only when I connect the home monitor to my intel integrated graphics do I get strain.
I had thought my that my benq BL2211 (the office computer) and my benq BL2405 (the home computer) were more or less the same monitor, but with a slightly different aspect ratio and input options. They have the exact same colour temperature, dpi, blacklight (pwm free) and general look, just the BL2211s are 1650x1050 and the BL2405 are 1080p. I guess the BL2211 is more an office product, and the BL2405 more for home users.
At first I mistakenly thought this was because the 6600k in the home computer was somehow different as the motherboard on my home pc has only hdmi outputs, and the office pc has vga - perhaps the office pc's motherboard was doing some post processing? (plausible as 6th gen intel doesn't support vga natively) I bought near enough the same computer that I use at the office to try out at home - it strained my eyes just like the 6600k home pc did. So I lug my home pc to the office to try it out with the BL2211s and no strain at all!
Some reviewing of the specs later I find the BL2211 monitors are 60hz, 5ms response time and the BL2405s are 60hz 2ms response time. From this I have concluded that for me, a slower response time makes me more tolerant of dithering. Remember the BL2405 is normally fine hooked up to my gtx660 which I am fairly sure doesn't dither. And the DPI and colour temps are identical. 3ms might not sound like much, but a 60hz monitor is updating the screen once every 16.6ms. So the BL2405 monitor spends up to 12% of its time changing the pixels to the new frame, whereas the BL2211 spends up to 30% of its time changing the pixels to the new frame, which I guess is why it looks smoother. The BL2405 looks like its pulsating when hooked to to the intel, whereas the BL2211 looks fine.
So given this, I'd implore anyone who thinks dithering is an issue for them to try out monitors with slower response times. Though I will give you a counter to this argument to manage your expectations. I am only mildly affected by dithering from intel cards. I find dithering from modern nvidia cards to be far worse, and unfortunately my BL2211s still causes me strain when hooked up to one.