Abstract: A method for fabrication of a lens element from a lens blank shaped from a high index, high thermal property thermoplastic resin conditions the surface of the lens blank by an extended annealing process. The temperature of the lens blank is increased to a soak temperature greater than 165 degrees C. over a ramp-up period of more than 2.5 hours, increasing the temperature during the ramp-up period by no more than 2 degrees C. per minute, on average. The lens blank is maintained at the soak temperature for a soak period of at least 3 hours. The temperature of the lens blank is lowered back to room temperature during a ramp-down period at a rate no faster than 1.5 degrees C. per minute, on average. This forms a conditioned lens blank that is diamond-turned to obtain an optical quality surface.

Abstract: A payment system, includes a plurality of purchasing units each associated with a unique identification number. The purchasing units can be purchased, and their existence is stored in central database. The purchasing units can be spent for instance over the Internet, and at this time, the purchasing units are redeemed by sending an appropriate signal including the unique identification number to the central database by the receiver of the payment.