Abstract: Active lens assemblies based on a deformable lens adhered to an electroactive polymer (EAP) membrane based actuator, active lens systems comprising such active lenses, and methods of actuating a deformable lens are described. The active lenses can provide controllable optical power, withstand constant periods of actuation, have low power consumption, have fewer mechanically moving parts, have fast response times and/or high portability. These benefits are important for use in precision-seeking applications, such as collision avoidance systems in automobiles.