I read an intriguing article at CNN. The article started by "Some students joke that their teachers have eyes in the backs of their heads." In New York a professor implemented a camera at the back of his head which would take a photograph every minute of his daily activities. I find that he is 'extending' his physical capabilities by adding a 'third eye' to the back of his head. The article also mentions "We place a high value on his right to free expression in his creative work as an artist," said university spokesman John Beckman. "But as a school of the arts, we also take seriously the privacy issues his project raises." The camera is implemented on the 'techno-mask I have built is quite blatant, and the person who is talking to should be aware that he/she is being recorded so that the issue of privacy is avoided.

http://articles.cnn.com/2010-12-02/us/new.york.camera.head_1_wafaa-bilal-domestic-tension-art-project?_s=PM:US