A treatment device for treating a lens included in an operational device, is disclosed. The Device may include a first segmented electrode, comprising at least two segments electrically isolated from one another, located in proximity to a first surface of the lens, wherein the first surface is to be treated by the treatment device; at least one second electrode; a distributor electrically associated with the first segmented electrode and with the at least one second electrode, and configured to distribute RF energy from a single RF generator to each of the segments of the segmented electrode separately; an RF generator for separately providing RF energy to the segments of the at least one first electrode and the at least one second electrode in an amount sufficient to generate plasma on at least a portion of the first surface of the lens, and a controller functionally associated with the distributor.