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US 8,985,767 B2Granted
Wavefront optimized progressive lens
AssigneesCarl Zeiss Vision International GmbH, Carl Zeiss Vision GmbH
InventorsRay Steven Spratt, Darryl Meister, Timo Kratzer
Life of this patent
Estimating the term…
Abstract
A method for designing a progressive lens is disclosed. The method includes obtaining a wavefront measurement of an eye, determining an initial design for the progressive lens based on the wavefront measurement, determining information about how changes in one or more higher order aberrations of the eye affect a second order correction for the aberrations of the eye based on information derived from the wavefront measurement, modifying the initial design of the progressive lens to provide a final progressive lens design, and outputting the final lens design.
Claims28
A method for designing a progressive lens, the method comprising:
- obtaining a wavefront measurement of an eye, the wavefront measurement comprising information about second order aberrations of the eye and about higher order aberrations of the eye;
- determining an initial design for the progressive lens based on the wavefront measurement, the initial design comprising, for one or more points on the lens, information about second order aberrations of the progressive lens and higher order aberrations of the progressive lens, the initial design providing a target correction for the eye in the absence of the higher order aberrations of the eye;
- determining information about how changes in one or more higher order aberrations of the eye affect a second order correction for the aberrations of the eye based on information derived from the wavefront measurement;
- modifying the initial design of the progressive lens using a computer processor to provide a final progressive lens design, wherein the modification accounts for an expected variation of the correction from the target correction due to one or more higher order aberrations of the initial progressive lens design and the information about how changes in one or more higher order aberrations of the eye affect the second order correction for the aberrations of the eye;
- and
- outputting the final lens design.
3 more elements
A non-transitory computer readable storage medium encoded with executable instructions comprising:
- instructions operable on a processor to determine an initial design for the progressive lens based on a wavefront measurement of the eye, the initial design comprising, for one or more points on the lens, information about second order aberrations of the progressive lens and higher order aberrations of the progressive lens, the initial design providing a target correction for the eye in the absence of higher order aberrations of the eye;
- instructions operable on a processor to determine information about how one or more higher order aberrations of the eye affect a second order correction for the aberrations of the eye based on information derived from a wavefront measurement of the eye;
- instructions operable on a processor to modify the initial design of the progressive lens to provide a final progressive lens design, wherein the modification accounts for an expected variation of the correction from the target correction due to one or more higher order aberrations of the initial progressive lens design and the information about how one or more higher order aberrations of the eye affect the second order correction for the aberrations of the eye;
- and
- instructions operable on a processor to output the final progressive lens design.
2 more elements
A method for designing a progressive lens, the method comprising:
- determining an initial design for the progressive lens based on a prescription for an eye, the initial design providing a target correction for the eye in the absence of third or higher order aberrations of the eye;
- determining how the prescription for the eye changes due to contributions from third or higher order aberrations of the eye;
- determining information about one or more third or higher order aberrations of the lens for multiple locations on the initial lens design;
- modifying, using a computer processor, the initial design of the progressive lens to provide a final progressive lens design, wherein the modification comprises compensating the initial lens design at the multiple locations to account for an expected variation of the correction for the eye from the target correction due to the one or more third or higher order aberrations of the initial progressive lens design and how the prescription for the eye changes due to contributions from third or higher order aberrations of the eye;
- and
- outputting the final lens design.
3 more elements
A non-transitory computer readable storage medium encoded with executable instructions comprising:
- instructions operable on a processor to determine an initial design for the progressive lens based on a prescription for an eye, the initial design providing a target correction for the eye in the absence of third or higher order aberrations of the eye;
- instructions operable on a processor to determine how the prescription for the eye changes due to contributions from third or higher order aberrations of the eye;
- instructions operable on a processor to determine information about one or more third or higher order aberrations of the lens for multiple locations on the initial lens design;
- instructions operable on a processor to modify the initial design of the progressive lens to provide a final progressive lens design, wherein the modification comprises compensating the initial lens design at the multiple locations to account for an expected variation of the correction for the eye from the target correction due to the one or more third or higher order aberrations of the initial progressive lens design and how the prescription for the eye changes due to contributions from third or higher order aberrations of the eye;
- and
- instructions operable on a processor to output the final lens design.
3 more elements
Dependencies are inferred from the claim text.