I just discovered this today when I was just browsing through YouTube videos. It's so AWESOME! I was honestly freaking out when "mastered" it. The technique is to cross your eyes so that you produce a 3rd image right in between two identical images. It takes some practice but once you have it down... the results are worth it!
Here's a great tutorial to help you with focusing on the 3rd image. Essentially... try to bring the two dots together using the cross-eyed technique and let your brain try to focus on it and then look a little further up at the rotating stuff while still keeping focus on the 3rd image. WATCH IN HIGHEST QUALITY AND FULL SCREEN. Also watch at a comfortable distance (too close and it's much harder for your eyes to focus) without any side distractions.
http://www.youtube.com/watch?v=zBa-bCxsZDk&feature=player_embedded#at=37
Note: It may appear blurry to you at first, but just keep trying to focus on it. Your brain is trying to do something that it never does. lol Some people get it instantly while others struggle at it.
Here are some other cool 3D videos to watch:
http://www.youtube.com/watch?v=SOUO37OP_vY&feature=related
http://www.youtube.com/watch?v=fvucQ7_2GQg&feature=relmfu
http://www.youtube.com/watch?v=6RFuRY7azgA&feature=related
Here's a great tutorial to help you with focusing on the 3rd image. Essentially... try to bring the two dots together using the cross-eyed technique and let your brain try to focus on it and then look a little further up at the rotating stuff while still keeping focus on the 3rd image. WATCH IN HIGHEST QUALITY AND FULL SCREEN. Also watch at a comfortable distance (too close and it's much harder for your eyes to focus) without any side distractions.
http://www.youtube.com/watch?v=zBa-bCxsZDk&feature=player_embedded#at=37
Note: It may appear blurry to you at first, but just keep trying to focus on it. Your brain is trying to do something that it never does. lol Some people get it instantly while others struggle at it.
Here are some other cool 3D videos to watch:
http://www.youtube.com/watch?v=SOUO37OP_vY&feature=related
http://www.youtube.com/watch?v=fvucQ7_2GQg&feature=relmfu
http://www.youtube.com/watch?v=6RFuRY7azgA&feature=related