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US 6,206,520 B1Granted
Contact lenses with contoured edges
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsPhilippe Jubin, Timothy Clutterbuck, Jeffery Roffman
Life of this patent
Estimating the term…
Abstract
The invention provides contact lenses that have contoured lens edges that improve lens handling and comfort.
Claims17
A contact lens comprising a convex and a concave surface, one or both of the surfaces consisting essentially of an optic zone and a contoured lens edge, the contoured lens edge comprising a functional form selected from the group consisting of a ratio of two polynomials, a parametric function, a conic section, and combinations thereof.
A method for designing a contact lens comprising the steps of:
- a.) designing an optic zone for a first lens surface;
- b.) selecting an x and a y coordinate for each of at least two points on the first lens surface;
- and
- c.) fitting a curve through the points specified in step b.) to form a contoured lens edge, the contoured lens edge being a substantially smooth curve comprising a functional form selected from the group consisting of a ratio of two polynomials, a parametric function, a conic section and combinations thereof.
1 more element
Dependencies are inferred from the claim text.