A system and a method implementing such a system. The system includes eyeglasses having hinged stems, a plurality of sensors and an alert alarm. The system further includes a triaxial accelerometer, an IR transmitter, an IR receiver, and a barometric sensor. The sensors are set up in the hinged stems and the rims of the eyeglasses and connected to a processing and calculation unit. The processing and calculation unit includes a microprocessor and a memory. The processing and calculation unit executes a computer program to analyze data issued by the sensors and triggers the alarm based on a result of the analyzed data.
