Contact lens molds and systems and methods for producing same
AssigneeCooper Vision, Inc.
InventorsNeil G. Goodenough, Gregg A. Dean
Life of this patent
Estimating the term…
Abstract
Contact lens molds and systems and methods for producing contact lens molds are described. The contact lens mold sections include two optical quality surfaces, a flange circumscribing at least a portion of the two optical quality surfaces, and an elongate member extending from the flange. Two mold sections can contact one another to form a mold assembly having a contact lens shaped cavity. The mold sections are structured to form a contact lens having an edge that does not require further physical modification before placement on an eye. Systems and methods are described which direct a molten polymeric material into cavities corresponding to the mold sections.
Claims13
A contact lens mold section, comprising:
- a lens defining region having a first lens-defining surface which is a negative of an optical quality anterior surface of a contact lens, a substantially opposing second lens-defining surface which is a negative of an optical quality posterior surface of a contact lens, a flange region circumscribing the first and second lens-defining surfaces, and
- an elongated region extending substantially radially outwardly from the flange region, the elongated region includes a first portion having a substantially uniform width and a second portion having a diverging width, the second portion being adjacent the flange region and being thinner than the first portion of the elongated region.
A mold assembly comprising:
- a first mold section comprising a lens defining region having a first lens-defining surface which is a negative of an optical quality anterior surface of a contact lens, a substantially opposing second lens-defining surface which is a negative of an optical quality posterior surface of a contact lens, a flange region circumscribing the first and second lens-defining surfaces, and
- an elongated region extending substantially radially outwardly from the flange region, the elongated region includes a first portion having a substantially uniform width and a second portion having a diverging width, the second portion being adjacent the flange region and being thinner than the first portion of the elongated region;
- and
- a second substantially identical mold section coupled to the first mold section to define a lens shaped cavity between the first lens defining surface of the first mold section and the second lens defining surface of the second mold section.
Dependencies are inferred from the claim text.