And the Durovis Dive updated their copy to differentiate themselves from the Vomit Machines, speelcheck (sic) is your friend however

using this device will make you less susceptible to nausia:

"You just insert your smartphone, start the application and adjust the lenses to your eyes. What follows, is a spectacular experience of new worlds. The Dive has an opening at the bottom that allows you to perceive your surrounding in your peripheral field of vision to keep your orientation grounded and to avoid nausia."

http://www.durovis.com/dive.html?country=US