Funny. i just saw this video a few weeks ago. there are kids in my class that can't read text 7-8 feet from them(nearsighted), and i am nearsighted as well, but i can still see WAY farther than they can.
I works o3o I can finally something 1ft in front of me without my glasses o3o,still can't see anything far away ;-;
I couldn't see the video (using chrome browser for iPad) but I think I know what this is I've seen it myself, it's pretty cool