There's hardware for that: http://www.framiral.fr/eng/multitest.php http://www.framiral.fr/eng/multitest.php Designed for military training, this type of devic

There's hardware for that: http://www.framiral.fr/eng/multitest.php http://www.framiral.fr/eng/multitest.php Designed for military training, this type of device is now available for civilian treatment. Must be cheaper to use an Occulus though.