The present invention provides a composite material, preferably an ophthalmic device, more preferably a contact lens, which comprises a vesicle-containing coating including at least one layer of a vesicle and one layer of a polyionic material having charges opposite the charges of the vesicle. The first circuit is configured to provide a first indication of whether or not at least one reservation is valid in the processor. This information apparatus has a small size and can be accurately controlled.