For the OEM "north american" headlamps, the beam pattern generated by the lenses are the same, in that they are focused towards the front. On the e-code "euro" lenses, the left and right side have different beam patterns. For LHD cars, the driver's side (L) sends the light straight down the road, while the passenger side (R) illuminates forward and also towards the sidewalk and also up to where road signs might be. If you're HIDs are sitting in "euros" that's what's happening. That's also why LHD cars should not be retrofitted with the headlight units from RHD countries like the UK or Japan, since the beam pattern would be reversed and send light more directly into the vision of oncomming vehicles in LHD countries.