Adaptive spectacles for motor vehicle drivers or passengers

Adaptive glasses for drivers or passengers of a motor vehicle, said glasses comprising lenses having a screen whose coefficient of transmission is variable between a maximum value (CTMAX) and a minimum value (CTmin),

• wherein said coefficient of transmission (CT) of said glasses lenses is controlled according to a wireless communication protocol;
• wherein said coefficient of transmission (CT) of said glasses lenses is controlled by a control unit;
• wherein said control unit receives signals from a sensor for measuring a brightness of a road scene in front of said vehicle, and said signals from an ocular sensor for measuring a quantity of light transmitted through said glasses lenses, said control unit having a feedback loop for use in the control of the coefficient of transmission whereby said ocular sensor senses at least some of the light received by the eye that has already passed through the glasses lenses such that the amount of light reflected by a cornea of a driver's eye provides a measurement of an amount of light transmitted through said glasses lenses and reaching said driver's eye, said control unit using said sensed amount of light to control said coefficient of transmission;
• wherein said ocular sensor of said quantity of light transmitted by said glasses lenses measures a quantity of light reflected by said cornea of said driver's eye.