Contact lens and a method for manufacturing contact lens
作者： Christopher A. Ducharme
DOI:
关键词: Second derivative 、 Contact lens 、 Polynomial 、 Piecewise 、 Mathematics 、 Geometry 、 Spline (mathematics) 、 Corneal topography 、 Smooth surface
摘要: A contact lens (30) having a smooth surface (55, 65) is made through the use of computer implementing spline approximation corneal topography (145). Piecewise polynomials approximating (145) have equal first and second derivatives where they join. curve (50) representing central optical portion piecewise polynomial (70) adjacent to an derivative cut corresponding defined by polynomials.
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