Does the subject have to face the camera?

The subjects face must hit the 7% FOV (Field of View) mark of the camera to get an accurate reading. It is looking for two measurement points. The first point is in the middle of the forehead, roughly the area in-between the two eyes, near the nose, and if it captures a profile image, it is looking for the skin around the ear hole. The person has to be walking into the view of the camera and not away.