A method for providing human input to a computer which allows a user to interact with a display connected to the computer. A first target is placed on a first portion of the user's body, whereby an electro-optical sensor senses data related to the location of the first target and data related to the...http://www.google.fr/patents/US7098891?utm_source=gb-gplus-shareBrevet US7098891 - Method for providing human input to a computer
