Ophthalmic optical lens for vision correction having one or more areas of more positive power
AssigneeBrien Holden Vision Institute Limited
InventorsBrien Anthony HOLDEN, Padmaja Rajagopal SANKARIDURG, Klaus EHRMANN, Fabian CONRAD, Arthur HO
Life of this patent
Estimating the term…
Abstract
The present disclosure is directed to lens, methods of making, designing lens and/or methods using lens in which performance may be improved by providing one or more steps in the central portion of the optical zone and one or more steps in the peripheral portion of the optic zone. In some embodiments, such lens may be useful for correcting refractive error of an eye and/or for controlling eye growth.
Claims27
An ophthalmic lens comprising:
- an optic zone comprising:
- at least one central portion having at least a first power profile and at least one peripheral portion having at least a second power profile;
- wherein the first power profile of the at least one central portion has at least a first step, the first step bounded on either side by a first junction and a second junction, the first power profile having a first change in the rate of change of power at the first junction and second change in the rate of change of power at the second junction, and
- the second power profile of the at least one peripheral portion has at least a second step, the second step bounded on either side by a third junction and a fourth junction, the second power profile having a third change in the rate of change of power at the third junction and a fourth change in the rate of change of power at the fourth junction.
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An ophthalmic lens comprising:
- an optical zone comprising:
- at least one primary area with at least one primary optical power;
- at least two secondary areas comprising:
- a first secondary area with a first optical power and a second secondary area with a second optical power;
- wherein at least one of the first secondary area and the second secondary area is peripheral of the at least one primary area, and the first and second optical powers are more positive than the at least one primary optical power;
- and
- wherein there is a first power transition from the at least one primary optical power to the first optical power having at least a first step and a second power transition from the at least one primary optical power to the second optical power having at least a second step, the steps not including the at least one primary area and the first and second secondary areas, and wherein for at least one of the first step and at least one of the second step, the magnitude of the rate of change of the power transitions decreases at the junction before the step and then increases at the junction after the step.
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Dependencies are inferred from the claim text.