Sometimes it happens to me too, so I flip the picture when I see something weird ... however, a drawing teacher advised me not to do so ... hmmm, well, I think I need to train better at detecting this sort of things in my drawings.
oh im well in touch with the flipping of the canvas trick it probably just wasnt that big a deal to me at the time oh and a lot of pros tell you to flip the canvas, personally i love doing it. It helps me spot errors all the time
But
One eye is bigger than the other, aside from that, is a great piece
And he/it looks alive, nice work.