Ophthalmic lens, systems and methods having at least one rotationally asymmetric diffractive structure
First Claim
Patent Images
1. An ophthalmic lens for correcting vision, comprising:
- an optic having at least a toric portion for correcting astigmatism and having a base cylinder power; and
less than 4 rotationally asymmetric diffractive echelettes integrated with the lens for extending depth of focus, wherein the extended depth of focus reduces sensitivity of the optic to at least one of rotation and the base cylinder power.
2 Assignments
0 Petitions
Accused Products
Abstract
An ophthalmic lens, such as an intraocular lens (IOL), a phakic IOL or a corneal implant, and a system and method relating to same, having coupled thereto and/or integrated thereon at least one rotationally asymmetric diffractive structure. The lens of the present invention may include a single or limited number of rotationally asymmetric diffractive echelettes that provides an extended depth of focus.
-
Citations
12 Claims
-
1. An ophthalmic lens for correcting vision, comprising:
-
an optic having at least a toric portion for correcting astigmatism and having a base cylinder power; and less than 4 rotationally asymmetric diffractive echelettes integrated with the lens for extending depth of focus, wherein the extended depth of focus reduces sensitivity of the optic to at least one of rotation and the base cylinder power. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A vision corrective optic, comprising:
-
a lens for correcting at least one aberration of an eye; a rotationally asymmetric depth of focus extender integrated with the lens, the depth of focus extender comprising less than four diffractive echelettes, wherein the depth of focus extender increases at least one of alignment tolerance and matching to the at least one aberration. - View Dependent Claims (8, 9, 10, 11)
-
-
12. A method for making an ophthalmic lens that decreases sensitivity of astigmatic correction to errors of cylinder power selection and lens rotational alignment, comprised of integrating a rotationally asymmetric diffractive structure with less than 4echelettes to a surface of an intraocular lens.
Specification