Abstract: A method and associated implementing system eliminates much of the stress presently introduced by the bonding of ophthalmic lens blanks, or blanks to a holding device, namely a metal block. The method of attaching ophthalmic lens blanks to a blocking assembly comprises the steps of shaping a blocking assembly to take the shape of an ophthalmic lens blank surface of an ophthalmic lens, wherein the blocking assembly is not attached directly to the ophthalmic lens blank during shaping of the blocking assembly; and following the shaping of the blocking assembly, attaching the lens blank to the shaped blocking assembly.

Abstract: A method of dynamic electronic storage of corrective lens manufacturing criteria comprises the steps of: a) providing eyeglass frame for holding a pair of corrective lenses; b) coupling a rewritable electronic storage medium to the eyeglass frame; c) storing corrective lens manufacturing criteria on the rewritable electronic storage medium. The corrective lens manufacturing criteria includes a distance power reference location, a near power reference location and a prism reference point location, astigmatism criteria, magnitudes and angles for prism, distance and near field vision correction of single vision or progressive lenses, lens design type and lens design vender. The rewritable electronic storage medium may be an RFID device embedded within a temple part of the frame, or a QR Code, such as a micro QR code, which is linked to a webpage containing the corrective lens manufacturing criteria.

Abstract: A manually operated lens cribber has a cutting compartment on a base. The cutting compartment has a door that is moveable between a closed position and an open position. A cutting tool is inside the cutting compartment and rotates about a first axis. A lens blank carrier is attached to the base in a manner to be manually movable across the base on a second axis that is substantially perpendicular to the first axis. The lens blank carrier has a hand operated screw mechanism on which a lens blank can be mounted and which moves the lens along a third axis that is substantially parallel to the first axis. A releasable end stop is positioned on the base for positioning the lens blank carrier relative to the cutting tool so that the desired amount of material is removed from the lens blank. A calibration and positioning scale is also provided.

Abstract: A method and apparatus for measurement of time required for an ultrasonic tone burst to traverse a medium from a transmitter to a receiver is disclosed. Two transducers separated by a distance through which a medium flows alternatively act as a transmitter and then a receiver of ultrasonic signals. After a signal has been emitted from the first ultrasonic transducer, the second transducer is electronically checked for receipt of the ultrasonic signal. That checking is done at certain time intervals, preferably 4 microseconds, over a selected period of time. Samples are taken over each time interval. For each sample time slot the presence and strength of an output signal is measured. An address in a memory is selected which corresponds to each sampling time slot. Each input sample is stored in memory at an address which corresponds to the time slot at which the input sample was taken.