It is aptly named as it is. When I had to give up on the Swarovski SV EL series, it was due to the way rolling ball affected me. It did make me nauseous and dizzy. Much like Binocollectors point in post 113. I never did expect to see it in the firat place from my first view through the SV, but was soon disabused of that notion. I have no doubt there was something somewhat unique between my DNA based optical system and the mechanical optical system iof the SV, and I harbor no illusions that my experience is in anyway applicable to anyone else. I have often thought that if I was GOD, I'd give everyone my rolling ball experience just for a few hours. That would be enough of an experience to settle the issue.