For automatic-type mirrors, no. That sort of mirror has a hinge to let the mirror rotate forwards and backwards on one axis. This is there to fold the mirror in

For automatic-type mirrors, no. That sort of mirror has a hinge to let the mirror rotate forwards and backwards on one axis. This is there to fold the mirror in, and to help absorb whacks. The mirror angle itself is adjusted by a separate, finer mechanism inside the unit. For manual-type mirrors the same joint - some kind of ball-and-socket affair, I imagine? - performs both functions. The joint has a much wider range of movement than you'd expect if it were just for catering for the position of the driver's head.