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Proceedings Paper

Computer numeric control generation of toric surfaces
Author(s): Norman Douglas Bradley; Gary A. Ball; John R. Keller
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Paper Abstract

Until recently, the manufacture of toric ophthalmic lenses relied largely upon expensive, manual techniques for generation and polishing. Recent gains in computer numeric control (CNC) technology and tooling enable lens designers to employ single- point diamond, fly-cutting methods in the production of torics. Fly-cutting methods continue to improve, significantly expanding lens design possibilities while lowering production costs. Advantages of CNC fly cutting include precise control of surface geometry, rapid production with high throughput, and high-quality lens surface finishes requiring minimal polishing. As accessibility and affordability increase within the ophthalmic market, torics promise to dramatically expand lens design choices available to consumers.

Paper Details

Date Published: 26 May 1994
PDF: 13 pages
Proc. SPIE 2127, Ophthalmic Lens Design and Fabrication II, (26 May 1994); doi: 10.1117/12.176839
Show Author Affiliations
Norman Douglas Bradley, Development Associates Controls, Inc. (United States)
Gary A. Ball, Development Associates Controls, Inc. (United States)
John R. Keller, Development Associates Controls, Inc. (United States)


Published in SPIE Proceedings Vol. 2127:
Ophthalmic Lens Design and Fabrication II
Donn Michael Silberman, Editor(s)

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