Users place their smartphone into the viewer, which houses a pair of 45 mm focal distance lenses placed an optimal distance away from the phone's screen. (educationnext.org)
It's great in crowded traffic, though drivers have to adapt to the shorter focal distance. (extremetech.com)
Some drivers may also have an acclimation period as they get used to looking at an LCD and focusing the eyes on a display 18 - 24 inches away, as opposed to the infinity focal distance of a glass mirror that redirects your eyesight. (extremetech.com)