| 摘要 |
The invention concerns a method for producing multifocal correction lenses from semi-finished lenses (1) having at least a first positioning marker M, associated with a correction A called distant vision correction, and a second positioning marker M' associated with a correction B called near vision correction. The method comprises a step which consists in a surface grinding of the semi-finished lens (1) on an internal surface of said lens. The latter is inclined at a specific angle ( beta ), for example using a wedge, so as to induce a prism of prismatic deviation such that the distant vision and the near vision optical centres are brought together and merge. The invention also concerns a system controlled by a data processing device, for example a micro-computer (8), for automatically carrying out the surface grinding step using a recorded programme and parameters input (80) by an operator.
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