Importance

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Abstract

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 anterior 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 with the posterior surface of the semi-finished lens, reassembling the semi-finished lens/fixture in the microsurface generating apparatus, ultra-precisely forming the curves or geometry comprising the anterior surface and another portion of the edge, and demounting a finished, ultra-precision lens from the blocking fixture. Also disclosed is a fluid-bearing automatic or semi-automatic machine for performing the instant method to ultra-precision, e.g., by computer control.

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First Claim