Dual play compatible cardboard glasses

With these glasses you can in particular 3D TV or projector presentations where the left and right separation is achieved by passive circular polarization, view dual play applications.
In particular, LG and Sony have developed such software for games.
The left and right channels may show entirely different content. However, with these glasses you can see the corresponding channels with both eyes properly.
The glasses can also be used at 3D movies where you can see one channel, left or right in 2D only. Intended for people who prefer to view in 2D at 3D movies. You get a set of 2 pieces.