This is a working camera, from a series of very creepy and/or artistic pinhole cameras, including one made with a child's embalmed heart, and one made with HIV+ blood. The website describes it as follows:
4”x5” camera made from Aluminium, Titanium, Brass, Silver, Gem Stones and a 150 year old skull of a 13 year old girl. Light and time enters at the third eye, exposing the film in the middle of the skull.
http://www.boyofblue.com/cameras/3rd_eye.html