Methods for designing composite ophthalmic lens surfaces
View Patent ↗The invention provides a method for designing a composite lens surface by using vector addition of the surface curvatures of two or more lens surfaces and then constructing a surface by numerical integration.
1. A method for designing an ophthalmic lens surface, comprising the steps of:
a.) calculating a principal curvature and an axis for each of two or more lens surfaces;
b.) performing a vector addition of the curvatures of the surfaces; and
c.) constructing a composite surface using numerical integration.
2. The method of claim 1 , wherein each of the two or more surface has a different base curve.
3. The method of claim 1 , wherein each of the two or more surfaces comprise a progressive surface.
4. The method of claim 3 , wherein each of the progressive surfaces has a different base curve.
5. The method of claim 2 , further comprising the step of scaling the x-y values for one of the two or more surfaces in relation to the composite surface.
6. The method of claim 2 , further comprising the step of scaling the x-y values for each of the two or more surface in relation to the composite surface.
7. The method of claim 4 , further comprising the step of scaling the x-y values for one of the two or more surfaces in relation to the composite surface.
8. The method of claim 4 , further comprising the step of scaling the x-y values for each of the two or more surface in relation to the composite surface.
9. The method of claim 5 , wherein the scaling is carried out by vector addition of the surface along a path of each of a plurality of lines connecting the surface to a center of rotation of an eye.
10. The method of claim 6 , wherein the scaling is carried out by vector addition of each of the two or more surface along a path of each of a plurality of lines connecting the surfaces to a center of rotation of an eye.
11. The method of claim 7 , wherein the scaling is carried out by vector addition of the surface along a path of each of a plurality of lines connecting the surface to a center of rotation of an eye.
12. The method of claim 8 , wherein the scaling is carried out by vector addition of each of the two or more surface along a path of each of a plurality of lines connecting the surfaces to a center of rotation of an eye.
13. A lens produced by the method of claim 1 .
14. A lens produced by the method of claim 2 .
15. A lens produced by the method of claim 3 .
16. A lens produced by the method of claim 4 .