From the website superfocus.com:
two lenses ... The pocket between them holds a small quantity of crystal clear fluid ... It is quick and easy to snap off one set of front lenses and replace them with another.
1. So what happens to the fluid when you snap off a front lens?
2. Why is there a need for multiple lenses? Can't Superfocus have a transition lens that automatically adjusts to changing light?
3. After Superfocus got a lot of attention in 2010 why have no big time eyeglass providers adopted and promoted them? In Manhattan there is one small provider. In Westchester county, NY none.
4. What, if anything, will insurance cover?
This Superfocus document is pretty good: