In the default planes (at least the ones I tried), when trying to click on a control that is on the front panel, the mouse icon is 2D (same position for both left and right eye). However, if you try to click on some things off the front panel (like the trim control on the flight stick on the xcub) or ANY(?) controls in 3rd party planes, the mouse pointer is 3D. The 3D pointer is lined up with the left eye.