The teachings of the present invention aid a user in attaining an ergonomic position with respect to a remote object such as a display screen (e.g., VDT) or a manufacturing tool. To that end, various mechanisms which feedback to the viewer information related to position and orientation are taught. A...http://www.google.co.uk/patents/US6244711?utm_source=gb-gplus-sharePatent US6244711 - Ergonomic systems and methods for operating computers
