Method for lathing a lens
AssigneeBausch & Lomb Incorporated
InventorsBuford W. Council, Jr., Lorenzo J. Salvatori, Philip D. Goller, Wayne R. Manning
Life of this patent
Estimating the term…
Abstract
A method of lathing a lens, especially a contact lens, involves attaching the cylindrical blank of lens material to a first block of machineable plastic material, lathe cutting a desired first lens surface in the cylindrical blank, attaching the machined first lens surface of the blank to a second block, lathe cutting to remove the block of machineable plastic material, and lathe cutting a desired second lens surface in the blank. Both the first and second blocks may be adhered to the lens blank with an adhesive curable by ultraviolet radiation, and a two-piece block, composed of a head section and a body section, is disclosed.
Claims4
An article comprising:
- a block for attachment to a contact lens blank having a concave, base curve surface, the block comprising a head section and a body section,
- the head section comprising a convex upper surface for adhering to the concave base curve of the blank with an adhesive curable by ultraviolet radiation,
- the body section comprising an elongated cylindrical body, and
- a lower portion of the head section being releasably securable in an upper portion of the body section,
- wherein the head section and the body section are transparent to ultraviolet radiation directed through the block to cure the adhesive.
Dependencies are inferred from the claim text.