Non-prolate bi-sign aspheric intraocular lens
AssigneeAaren Scientific Inc.
InventorValdemar Portney
Life of this patent
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Abstract
An intraocular lens for implantation into a human eye is described. The lens has at least one aspheric surface configured with non-prolate profile to maintain lens optical advantage as compared with equivalent power spherical lens within realistic clinical condition of lens tilt and decentration.
Claims21
An optic comprising an intraocular lens having a front and a back surface, at least one of the front and back surfaces comprising a continuous non-prolate aspheric surface with at least two regions, a peripheral region and a central region, the peripheral region of the optic being configured for producing a peripheral region longitudinal ray aberration, the central region of the optic being configured for producing a central region longitudinal ray aberration, the peripheral region longitudinal ray aberration being of a different sign than the central region ray aberration, wherein the central region is inside the peripheral region and where the peripheral region is inside a 5 mm diameter.
A method for producing an aspheric optic with minimized effect on image quality by lens misalignment occurred clinically:
- providing an intraocular lens having a front surface and a back surface;
- shaping one of either the front surface and back surface with at least two regions, each region configured for producing a different sign of longitudinal ray aberration of each region, wherein the at least two regions comprise a peripheral region and a central region, the peripheral region of the aspheric optic being configured for producing a peripheral region longitudinal ray aberration and the central region of the optic being configured for producing a central region longitudinal ray aberration, wherein the central region is inside the peripheral region and where the peripheral region is inside a 5 mm diameter.
An intraocular lens, comprising:
- a front and a back surface;
- wherein either the front or back surface comprises a continuous non-prolate aspheric surface with at least two regions;
- wherein the at least two regions comprise a peripheral region surface and a central region surface, where the central region is inside the peripheral region and where the peripheral region is inside a 5 mm diameter;
- wherein the peripheral region surface of the optic is configured for producing a peripheral region longitudinal ray aberration by having a steeper curvature as compared to a spherical surface;
- wherein the central region surface of the optic is configured for producing a central region longitudinal ray aberration by having a flatter curvature as compared to the spherical surface;
- and
- wherein the peripheral region longitudinal ray aberration is of a different sign than the central region ray aberration.
Dependencies are inferred from the claim text.