| 摘要 |
The invention concerns a method for producing a lens (6), one side of which (9, 10) has a complex multifocal or progressive or regressive multifocal surface (7). This method comprises the following steps: 1-forming a mold (1) composed of two parts (2, 3), each having an imprint (4, 5); 2-machining at least one of the imprints (4, 5), via a first machining with a digitally controlled, micrometrically precise machine using a computer file of tool movement points defining a complex surface (7), and a nanometric finish machining with a digitally controlled diamond turning tool; 3-injecting a thermoplastic polymer-based material into the mold (1). The invention also concerns a complex lens made of injected thermoplastic polymer, particularly methyl polymethacrylate.
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