Method of producing a corrective spectacle lens and lens blank used for same

摘要

The method of the invention for manufacturing a correctable lens for glasses from an injectable thermo-plastic polymer material, or other moldable polymer, consists in: molding a glass blank ( 2 ) provided with the contour of the corrective lens; assembling the lens blank with a peripheral piece ( 3 ) having the same internal radius of curvature as that of the glass blank ( 2 ), so as to compose a lens blank ( 1 ); grinding and polishing the internal face of the lens blank ( 1 ) to obtain the desired ocular correction; separating the glass blank ( 2 ) from the lens blank to obtain the corrective lens ready for assembly with the frame.