Stereoscopic 3D (cross-eyed 3D)
Cross your eyes until both images merge in the middle.

If you're having trouble, take your index finger and place the tip against your monitor - right under the image,
between the two pics. Slowly move your finger towards your face, focusing on it but also paying attention as the
2 images merge closer and closer as you bring your finger to your face. Once the images merge into one you
should be able to look up and be fixed on the 3D. You should now see 3 screens, the one in the middle is the
3D and there's also one on each side, don't pay attention to those.

Also know that the farther away you are from your monitor, the less you
have to cross your eyes, which should make it easier.