A system includes a master device and a slave device. This volume comprises a plurality of annular segments in the form of cells separated in pairs by blades of a first fan, these blades passing through both the primary flow and the secondary flow. While the ion transport mechanism interference agent is capable of interfering with the cellular mechanisms and cell ion distribution of a broad range of cells, a concentration of agent is selected such that the treatment solution interferes selectively with the cellular mechanisms of lens epithelial cells while leaving other ocular cells substantially unharmed. The planarization before the device epitaxial layers are deposited ensures a flat surface for state-of-the-art lithography. Adjacent the front edge and rear edge of a blade, it has substantially the same outline as the adjacent part of the associated blade, and in a middle region between the front and back edge is wider, by an approximately constant amount, than the adjacent part of the blade. The housing may, at least, partially enclose one or more fuel sources.