A system, comprising: - a head mounted device comprising: - a spectacle frame with temple tips, - at least one sensor (41, 42, 43, 44, 45, 46) configured to sense at least one feature, - a communication component configured to communicate data indicative of the at least one feature sensed by the at least one sensor of the head mounted device, and - a monitoring component, external or integrated to the head mounted device, for monitoring the relative position of the head mounted device and a user of the head mounted device, the monitoring component comprising: - a memory configured to store computer executable code, and - a processor configured to execute the following computer executable codes stored in the memory: a communication code configured to receive data from the head mounted device indicative of at least one feature sensed by the at least one sensor of the head mounted device, an information generating code configured to generate an information indicative of the relative position of the head mounted device and the user of the head mounted device based at least on the data received from the head mounted device, characterized in that the at least one sensor comprises six capacitive sensors (41, 42, 43, 44, 45, 46) along a temple tip of the head mounted device, the capacitive sensors being configured to sense a contact between the skin of the user and the head mounted device such as to determine if the head mounted device is turned up or down. - a head mounted device comprising: - a spectacle frame with temple tips, - at least one sensor (41, 42, 43, 44, 45, 46) configured to sense at least one feature, - a communication component configured to communicate data indicative of the at least one feature sensed by the at least one sensor of the head mounted device, and - a spectacle frame with temple tips, - at least one sensor (41, 42, 43, 44, 45, 46) configured to sense at least one feature, - a communication component configured to communicate data indicative of the at least one feature sensed by the at least one sensor of the head mounted device, and - a monitoring component, external or integrated to the head mounted device, for monitoring the relative position of the head mounted device and a user of the head mounted device, the monitoring component comprising: - a memory configured to store computer executable code, and - a processor configured to execute the following computer executable codes stored in the memory: a communication code configured to receive data from the head mounted device indicative of at least one feature sensed by the at least one sensor of the head mounted device, an information generating code configured to generate an information indicative of the relative position of the head mounted device and the user of the head mounted device based at least on the data received from the head mounted device, characterized in that the at least one sensor comprises six capacitive sensors (41, 42, 43, 44, 45, 46) along a temple tip of the head mounted device, the capacitive sensors being configured to sense a contact between the skin of the user and the head mounted device such as to determine if the head mounted device is turned up or down. a communication code configured to receive data from the head mounted device indicative of at least one feature sensed by the at least one sensor of the head mounted device, an information generating code configured to generate an information indicative of the relative position of the head mounted device and the user of the head mounted device based at least on the data received from the head mounted device, characterized in that the at least one sensor comprises six capacitive sensors (41, 42, 43, 44, 45, 46) along a temple tip of the head mounted device, the capacitive sensors being configured to sense a contact between the skin of the user and the head mounted device such as to determine if the head mounted device is turned up or down.