What I find is that if I have to look at a monitor that is set to 60, and its not my machine, for which I won't alter the settings, that if I shut the overhead light off it helps.

Seems that the incandescent light strobes at nearly the same speed, but at a different time and causes my screen to strobe out of sync and makes my head hurt.

Now, this might just be pure bulls**t, and more of a placebo effect but it helps me.

At home, my crt is set to 85.

Refresh rate applies to CRT monitors and is measured in Hz. Response time applies to LCD monitors and is measured in ms.

The refresh rate of a CRT monitor is how many times per second the electron beam passes over the screen to draw an image on it. So for a CRT at 60Hz, you have every pixel on the screen coming on, fading out gradually until its refreshed 1/60th of a second later. This is why you get the annoying flicker. Faster refresh rates cause it to all blur together and cause you fewer problems.

The response time of an LCD monitor is how long it takes a pixel, on average, to switch between fully black and fully white. Of course this is only a rough measurement, since response time does matter on the position and colour (red, green or blue) of the specific pixel measured, the colour gradient you move through, etc. So the two concepts cant be compared directly against each other. By your calculation there, a 12ms monitor would barely keep up with a 75Hz black/white strobing effect. This can be noticeable in games, if your view moves quickly across a sharp colour gradient. You can even see it here, with the white on black, if you scroll the page. The time taken for black pixels to switch to white and vice versa causes image ghosting.

Has. Was informative. Dunno what it was called though so good luck.

Go search it out.