Avatar 3D Viewing: Do You Need Two Eyes?

Yes, Avatar requires two eyes to see the 3D effects.

The 3D effect in Avatar is created by using two slightly different images, one for each eye. When seen through special 3D glasses, these images create the illusion of depth and allow the viewer to experience the film in three dimensions. Without two eyes, or without the 3D glasses, the 3D effect would not be visible.