Back to results
US 6,527,389 B2Granted
Multifocal ophthalmic lens
AssigneeAdvanced Medical Optics, Inc.
InventorValdemar Portney
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAdvanced Medical Optics, Inc.
InventorValdemar Portney
Estimating the term…
An improved ophthalmic lens is disclosed which has a plurality of alternating power zones with a continuously varying power within each zone, as well as in transition from one zone to another. In other words, a plurality of concentric zones (at least two) are provided in which the variation from far to near vision correction is continuous, i.e., from near correction focal power to far correction focal power, then back to near, and again back to far, or vice versa. This change is continuous (progressive), without any abrupt correction changes, or “edges”. Two versions of the invention are disclosed. In the first version continuous, alternating power variation is accomplished by a continuously changing curvature of the lens posterior surface, thereby altering the angle of impact of light rays on the eye. In the second version continuous, alternating power variation is accomplished by creating non-homogeneous surface characteristics having refractive material indexes which continuously vary in the lens radial direction (out from the optical axis).
A method comprising shaping first, second and third regions of a surface of an ophthalmic lens structured to be carried by or in an eye to provide the first region with a first vision correction power, the second region with a second vision correction power which is different from the first vision correction power to enhance vision at first and second different distances, respectively, and the third region between said first and second regions to provide vision correction powers which include vision correction powers which are between the first and second vision correction powers, the third region including progressive vision correction powers.
A method comprising:
An ophthalmic lens structured to be carried by or in an eye having a first region having a configuration which provides a first vision correction power, a second region having a configuration which provides a second vision correction power which is different from the first vision correction power to enhance vision at first and second different distances, respectively, and a third region between the first and second regions having a configuration which provides vision correction powers which include vision correction powers which are between the first and second vision correction powers, the third region including progressive vision correction powers.
An ophthalmic lens having progressive vision correction powers in at least one of first, second and third at least partially annular regions, said second and third regions at least partially circumscribing the first and second regions, respectively, the first and third regions constituting a first set of regions, the progressive vision correction powers of said first set of regions, if any, including progressive vision correction powers which increase in a radial outward direction and the progressive vision correction powers of said second region, if any, including progressive vision correction powers which decrease in a radial outward direction.
Dependencies are inferred from the claim text.