

Very early on, Tesla used lidar radar in addition to optical sensors. However, they only use optical sensors today and have for a while. Like many of the poor decisions at that company, the change to optical-only was made at Musk’s demand.
Edit: misremembered, it was radar not lidar as pointed out below
I never really thought about it as left and right monitors, but my main monitor (30" 16:10) is centered and my secondary monitor (27" 9:16 vertical) is off to the right.