The invention relates to a multi-layer film having at least one fluoropolymer layer, useful for high-purity contact applications. The first sense amplifier is coupled to a first local data line and has an output terminal for providing a signal indicative of a state of a selected memory cell on the first local data line. The monitoring and control software is available only to the treating physician, such that the physician interacts with the implantable device via the charging and communication system. In some embodiments, the polymer foams can be formed within a body cavity. An embodiment of the invention is directed to a multi-component accommodating intraocular lens.