Fuente: Wipo "Sensorization" A head-mountable device (HMD) includes a housing, a securement band and an optical module both coupled to the housing coupled to the housing. The securement band retains the HMD on a head of a user. The optical module includes an internal display projecting light toward the user and an internal sensor oriented toward the user. An input device is coupled to the housing and adjust a position of the optical module. The input device may adjust the position of the optical module relative to the housing. A worn electronic device includes a housing, an optical module and an input device. The optical module is coupled to the housing and includes first and second displays. The input device is on an exterior of the housing. Relative positions of the first and second displays are adjusted based on a signal from the input device.  A display system includes a housing, an input device, a display and a sensor. The input device is positioned on an exterior of the housing. The display displays an image to a user. The sensor faces toward the user and its position relative to the housing is adjusted based on an input received by the input device.