Switchable lens systems and methods of manufacturing switchable lens systems are provided. The carriage releasably retains the component. As a result, the shape of the surface of the SiON film becomes gentler and deep trenches disappear. The device can be used for brachytherapy. The electrically driven pump may include hydraulic drive shaft bearings and starting mechanical drive shaft bearings that disengage at operating speed due to axial shift of the drive shaft.