Apple's old iSight webcams had a white iris that opened and closed by twisting a ring at the front of the camera. It was very nicely built and you could see whe

Apple's old iSight webcams had a white iris that opened and closed by twisting a ring at the front of the camera. It was very nicely built and you could see whether the iris was closed from across the room. Photo here: https://www.flickr.com/photos/mdpettitt/41991398752 https://www.flickr.com/photos/mdpettitt/41991398752