I don't know...playing fiddle with your eyes closed or in the dark seems to be easy for me too. I don't have to look at any hand to play fiddle. But then again I'm not that good and can't play anything really difficult that looking at the left hand would be a neccesity. I think it's also much easier to look over the bridge at the audience...much easier than guitar. I have a bad eye, a floating eye, they call it. When I play, I let that eye relax, and float, so I get the surreal double image of the people watching. That kinda takes the scariness out of it, since they look more like some bizarre photographic trick that real people.