Here's a VA comment for this thread:
"VA has the strongest horizontal contrast shift of any LCD panel type. People say viewing angles don't matter if you sit straight behind the monitor, but that isn't true.
If you sit typically close to a VA monitor, the horizontal viewing angle weakness is strong enough, that each eye will be a different angle to the screen, that different angle means each eye sees a different brightness. This can create weird edge artifacts and false 3D effect that shifts with small changes in head position. Most people aren't sensitive to this, but I am, so VA will give me headaches because of this, and I can't use them for very long. Again this doesn't seem to bother most poeple."
Personally, I suspect most people sit too close to their monitors. The screen should be a decent distance away from the eyes and brain. I used to run my 19" CRT at 100 Hz and only 800 x 600. That's because I had the good sense not to sit too close to the screen, same as how everyone used to know to stay away from their TV sets.
In any case, I'd be interested in an informative update from Slacor about his ViewSonic MVA experiences. I've yet to read a negative review about these screens regarding eye comfort and eye strain.