Just to be sure:
You lose your ability to crit when you lose an eye.
You get the ability to crit back (with +1cha and -1int) when you use Volos eye.
I guess it also works when you lost an eye because of the hag?
I *think* that they simply never lost the ability to crit. I believe that BraveSirRob simply picked Volo's pocket and stole the eye. You lose the crit when you lose *YOUR* eye, but if you just click on Volo's eye you get the stat exchange with no effect on crit. So if you pick his pocket and click then you get the stats without losing crit.
