Electrical, optical, measuring and signaling apparatus, instruments and systems all for machining, cutting, milling, grinding, drilling beveling, grooving, polisher or cleaning of the edge and/or the optical surfaces of ophtalmic lenses made of glass or plastic, namely, lens edging, tracing and blocking machines; computerized scientific systems for use in connection with the aforesaid apparatus, instruments, namely, computer controlled lens edging, tracing and blocking machines; mechanical, optical, electrical and computerized lens decentering and blocking apparatus, namely, lens blocking meachines; block pads and block adapters being parts of optical apparatus and instruments, namely, blocking pads and adacpters for use in blocking machines; tension rings made of metal or plastic for use in connection with optical apparatus and instruments, namely, tension rings for use in lens edging, tracing and blocking machines; tracers and tracer machine systems, namely, computerized marchines for tracing the dimensions of a spectacle frame, a template or a pattern or an ophthalmic lens

Computer software used to monitor and control the performance, operation, safety; quality and accuracy of lens edging, tracing and blocking machines in the optical supply field