You can have a look at http://www.alibaba.com/showroom/zoom-glasses.html. There are many zoom glasses. But some of them are sunglasses and some of them are just regular glasses. And there is a kind of glasses that looks so unfamiliar. I think maybe they are used for playing computer games. But I am not sure about that. Which kind of eyewear do you want to buy? You can have a look first. Hope this helped!
Yes, I have heard about that kind of glasses. Zoom glasses have a built in system that acts like a camera's zoom lenses. You can have a look at http://www.youtube.com/watch?v=BDtxhit_PTA. Then you will have a good understanding about this kind of glasses. Hope this helped!
There is a kind of zoom binocular sunglasses. They are perfect for movies, sporting events, nature walks and so on. But I don't know whether they are the glasses that you want to find. You can have a look at http://www.amazon.com/BeWild-Incredible-Zoom-Binocular-Sunglasses/dp/B00C2BZCD0.