Glasses with at the right a special green filter and on the left a magenta coloured filter.
This a patented system by the same called French company.
The system makes use of the so-called z-buffer (depth buffer). It is currently used in combination with certain games at the moment.

Now compatible for Badman Arkham Asylum.

Without the glasses, you will see the game in full colour but there are colour details processed in the image which are filtered by the TriOviz glasses, giving the feeling of depth.
Minimum order quantity is 4 pieces.