This invention relates to ophthalmic devices and methods for their production where the ophthalmic device contain a polymer and at least one heterocyclic compound comprising at least one N\u2014Cl andor N\u2014Br bond. The accumulator may be couplable to a system under repair to receive contaminated refrigerant therefrom. The body has and inner lumen extending therethrough. The array also comprises a circuit for suppressing those pulses that are compared negatively versus the corresponding pulses in another pixel of the neighborhood for the same one or more criteria.