A cutting device for the precision trimming of a symmetrical portion of the peripheral edge of a centrifugally cast lens secured within a cavity of a female mold without the need for extensive and complex prior alignment of the cutting tool with the lens....http://www.google.com.au/patents/US4534723?utm_source=gb-gplus-sharePatent US4534723 - Cutting device for the precision trimming of the edge of a centrifugally cast lens
