Metaio's newest Beta version of its augmented reality SDK has now been optimized for wearable computing devices like the Epson Moverio BT-200. Instead of utilizing a camera view, Metaio's technology allows the user to perceive reality itself with digital and virtual content directly overlaid onto their surroundings potentially providing game developers with the opportunity to create AR games with a more immersive feel..

http://appdevelopermagazine.com/1423/2014/5/9/Metaio-Releases-New-Beta-Version-of-Augmented-Reality-SDK-Providing-Enhanced-Game-Development-Capabilities/