Wearing detection module for spectacle frame

A head mounted device comprising:

• a smart spectacle frame having a spectacle frame element positioned on one side of the smart spectacle frame that includes a first surface that faces a wearer when using the smart spectacle frame and a second surface opposed to the first surface that does not face the wearer when using the smart spectacle frame, the spectacle frame element including a wearing detection module configured to be fixed on the spectacle frame element, the wearing detection module including
• a pair of sensors arranged on opposite surfaces of the spectacle frame element and each configured to measure a distance between the spectacle frame element and the wearer, one sensor is arranged on the first surface of the spectacle frame element that faces the wearer when using the smart spectacle frame and the other sensor is arranged on the second surface of the spectacle frame element that does not face the wearer when using the smart spectacle frame, both sensors positioned on a same side of the wearer's head, and
• processing circuitry configured to receive data of the distance sensed by each of the sensors and to determine wearing data indicative of use by the wearer of the smart spectacle frame based on the received data.