What You Need:
You need to get a pack of cards where there is a design on the backs of the cards. The design should be asymmetrical, that is it should look different if you hold it upside-down. Cards with pictures on them are great for this trick.
You might also locate some of the recently printed Rider Back Bicycle decks. For some reason, the backs of the cards are printed off-center and this will work for the trick.
Set up the deck to that all of the cards are facing the same direction.
To Perform:
Shuffle the deck. When you do this, you must shuffle them so that the cards are shuffled in the same direction. That is, when they are shuffled, the backs of the cards stay the way they were when you set up the deck. Any overhand shuffle will do.
Have your friend freely select any card.
Have him look at his card and remember it.
Note how your friend is holding the card.
If he hasn't turned the card end-for-end, you must turn your pack around so that when he returns his card, it will be the only "reversed" card in the pack. (If he has turned the card end-for-end, just keep your pack the way it is.)
Have him return his card and shuffle the pack as before so that the cards remain facing the same direction.
At this point, you have a pack of cards with the backs all facing the same way — except for one card.
Fan the cards with the backs towards you. If you are looking at the backs and they are all pictures, it will be way too obvious to your friend that his card is the only reversed on there, so be sure he doesn't see the backs. (Of course, if you are using those off-center Bicycle decks, you can let him see the backs and it will be all the more mystifying!)
Explain that you are using your "Invisible Vision" to locate his card, and when you see his card, pull it out and dramatically exclaim that this is his card.
Return it to the pack and shuffle it so that you do mix up the way the cards are facing. Any riffle shuffle will do here. This way, you can let the pack be examined!