Method and apparatus adapted for automatic or semi- automatic fabrication of ultra-precision ophthalmic lenses, e.g. contact lenses

Abstract From the Canadian patent

A method for forming a plurality of optical surfaces on an optical lens precursor, desirably a "soft" contact lens button or blank, to yield a lens adapted for proximate or intimate contact with an eyeball and defined by at least one posterior surface, an edge and at least one interior surface, is comprised of forming a precision lens precursor, assembling the precursor in a microsurface generating apparatus, ultra-precisely forming the curves or geometry comprising the posterior surface and a portion of the edge to yield a semi-finished lens blocking the, semi-finished lens on an adhesively coated lens block fixture having an ultra-precisely preformed face for intimate precision mating …