Rear visibility without the camera, good or bad?

Those of us with poor depth perception couldn't manage without the backup camera. I find the Prius the easiest car to park that I've ever owned, thanks to that camera. (I still don't know where the front of the car is, but that's another matter.) Having said that, I do think there are visibility issues even with the camera, so I am extra cautious when backing and when turning due to view obstructed by the pillars. I might get whiplash from swiveling my neck, but I still think Fiona is the best car I've ever driven.