Multizonal lens with enhanced performance
First Claim
1. An intraocular lens, comprising:
- an optic having a clear aperture having an outer diameter, the optic comprising;
a first surface and an opposing second surface, the surfaces being disposed about an optical axis, the first surface having a first radius of curvature at the optical axis and the second surface having a second radius of curvature at the optical axis;
a central zone disposed about the optical axis having an outer diameter and a central zone profile with an optical power that progressively increases from a first paraxial optical power at the optical axis to a second optical power at the outer diameter that is greater than the first paraxial optical power,wherein the outer diameter of the central zone defines a radial extent of the central zone, andwherein the outer diameter of the central zone is selected to a size of a typical pupil that is fully contracted, and the central zone having a peripheral area with a greater curvature than a center area of the central zone to achieve has a positive spherical aberration selected to provide an extended depth of focus and pseudo-accommodation;
an outer zone disposed about the central zone, the outer zone comprising an inner diameter and an outer diameter equal to the outer diameter of the clear aperture and an outer zone profile, wherein the inner diameter and the outer diameter define a radial extent of the outer zone, and further wherein the outer zone has a third optical power that is less than the second optical power; and
a transition zone in between the outer diameter of the central zone and the inner diameter of the outer zone, having a radial extent that is less than 20% of the radial extents of the center and outer zones and is configured to smoothly blend between the center and outer zones.
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Accused Products
Abstract
An intraocular lens for providing enhanced vision includes an optic having a clear aperture having an outer diameter. The optic has opposing first and second surfaces disposed about an optical axis, the first surface including a cross-sectional profile. The optic further includes central and outer zones that fill the entire clear aperture of the optic. The central zone is disposed about the optical axis having an outer diameter, the profile in the vicinity of the central zone having a constant radius of curvature or a radius of curvature that increases with increasing radius from the optical axis. The outer zone is disposed about the central zone, the profile in the outer zone having a base curvature with a base radius of curvature and a center of curvature, the profile in the outer zone characterized in that, as the distance from the optical axis increases, the distance from the center of curvature of the base curvature also increases. The central zone and the outer zone.
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Citations
7 Claims
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1. An intraocular lens, comprising:
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an optic having a clear aperture having an outer diameter, the optic comprising; a first surface and an opposing second surface, the surfaces being disposed about an optical axis, the first surface having a first radius of curvature at the optical axis and the second surface having a second radius of curvature at the optical axis; a central zone disposed about the optical axis having an outer diameter and a central zone profile with an optical power that progressively increases from a first paraxial optical power at the optical axis to a second optical power at the outer diameter that is greater than the first paraxial optical power, wherein the outer diameter of the central zone defines a radial extent of the central zone, and wherein the outer diameter of the central zone is selected to a size of a typical pupil that is fully contracted, and the central zone having a peripheral area with a greater curvature than a center area of the central zone to achieve has a positive spherical aberration selected to provide an extended depth of focus and pseudo-accommodation; an outer zone disposed about the central zone, the outer zone comprising an inner diameter and an outer diameter equal to the outer diameter of the clear aperture and an outer zone profile, wherein the inner diameter and the outer diameter define a radial extent of the outer zone, and further wherein the outer zone has a third optical power that is less than the second optical power; and a transition zone in between the outer diameter of the central zone and the inner diameter of the outer zone, having a radial extent that is less than 20% of the radial extents of the center and outer zones and is configured to smoothly blend between the center and outer zones. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification