The device (1) has a converter (3) with electrodes (5A, 5B) generating an electric and/or magnetic and/or electromagnetic signal in response to a mechanical energy generated by a movement of an eye. A flexible lens is arranged for being positioned at the level of the eye. The converted is arranged with respect to the lens so that optical properties of the lens changes under the action of the signal during the movement. The lens has a polymer material in which a liquid crystal (4) having a refection index is added, where the index varies under the action of signal during the movement.
