Head mountable display

A head-mountable display, comprising:

• a housing comprising:
• a front end facing an environment of the head-mountable display;
• a rear end facing a user wearing the head-mountable display when donned;
• a front facing camera attached to the front end and configured to observe a feature of the environment;
• a rear facing camera attached to the rear end and configured to detect an eye feature of the user;
• an input member accessible on an exterior of the housing;
• and
• a processor electrically coupled to the input member and configured to cause the head-mountable display to perform an action based on both an input received at the input member and an input received from the eye feature of the user.

A head-mountable display device, comprising:

• a frame;
• a front facing sensor system attached to the frame and configured to detect an environment of a user;
• an optical module attached to the frame and configured to detect a facial feature of the user;
• an input member accessible from an exterior of the head-mountable display device;
• and
• a processor electrically coupled to the input member and configured to cause the head-mountable display device to perform an action based on both an input received at the input member and the facial feature of the user.