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US 6,554,427 B1Granted
Methods for designing contact lenses
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsBrett A. Davis, Jeffrey H. Roffman, Michael J. Collins, Daoud R. Iskander
Life of this patent
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Abstract
The invention provides a method for designing lenses and lenses produced thereby in which method locally fitted Chebyshev polynomials are used to design one or more of the lens' surfaces.
Claims19
A method for designing a lens surface, comprising using a polynomial of the equation:
- T[1]=l,
- T[2]=x,
- T[j]=2x.T[j−1]−T[j−2]
- wherein j is the order of the polynomial+1 and x is a spatial dimension.
1 more element
Dependencies are inferred from the claim text.