Abstract: Disclosed are a system and a method for hands free operating of a head mounted device. An example method includes reading sensor data from sensors associated with a head mounted device worn by a user. The method allows recognizing, based on the sensor data, a gesture generated by a movement of a head of the user. In response to the recognition, an operation associated with the recognized gesture and a mode of the head mounted device of the head mounted device is performed. The gesture can include a rotation, a pitch, and a roll. The operation includes zooming an image on a screen of the head mounted device, panning the image, scrolling a series of images on the screen, and switching modes of the device. A speed of execution of the operation is proportional to a ratio determined from an angle of the head movement.