Zone extension systems and methods
AssigneeAMO Development, LLC
InventorGuang-ming Dai
Life of this patent
Estimating the term…
Abstract
Wavefront measurements of eyes are often taken when the pupil is in a first configuration in an evaluation context. The results can be represented by a set of basis function coefficients. Prescriptive treatments are often applied in a treatment context, which is different from the evaluation context. Hence, the patient pupil can be in a different, second configuration, during treatment. Systems and methods are provided for determining a transformed set of basis function coefficients, based on a difference between the first and second configurations, which can be used to establish the vision treatment.
Claims18
A method of calculating a modified normalized Zernike expansion coefficient for an optical system of a patient, through the use of a computer, the method comprising:
- inputting an original normalized Zernike expansion coefficient for the optical system, the original normalized Zernike expansion coefficient associated with a first pupil dimension;
- calculating a modified normalized Zernike expansion coefficient for the optical system, the modified normalized Zernike expansion coefficient associated with a second pupil dimension, the second pupil dimension greater than the first pupil dimension;
- and
- determining a treatment for the optical system of the patient based on the modified normalized Zernike expansion coefficient,
- wherein the modified normalized Zernike expansion coefficient is calculated based on the original normalized Zernike expansion coefficient scaled by a scaling factor, the scaling factor comprising a ratio of the second pupil dimension to the first pupil dimension, the ratio raised to the power of a factor comprising a radial degree of the coefficient and
- wherein the treatment comprises a member selected from the group consisting of an intraocular lens treatment, a contact lens treatment, and a refractive laser treatment.
A system for calculating a modified normalized Zernike expansion coefficient for an optical system of a patient, the system comprising a data processing module comprising a processor and a tangible non-transitory computer readable medium, the computer readable medium programmed with a computer application that, when executed by the processor, causes the processor to:
- receive an original normalized Zernike expansion coefficient for the optical system of the patient, the original normalized Zernike expansion coefficient associated with a first pupil dimension;
- calculate a modified normalized Zernike expansion coefficient for the optical system of the patient, the modified normalized Zernike expansion coefficient associated with a second pupil dimension, the second pupil dimension greater than the first pupil dimension;
- and
- determine a treatment for the optical system of the patient based on the modified normalized Zernike expansion coefficient,
- wherein the modified normalized Zernike expansion coefficient is calculated based on the original normalized Zernike expansion coefficient scaled by a scaling factor, the scaling factor comprising a ratio of the second pupil dimension to the first pupil dimension, the ratio raised to the power of a factor comprising a radial degree of the coefficient, and
- wherein the treatment comprises a member selected from the group consisting of an intraocular lens treatment, a contact lens treatment, and a refractive laser treatment.
A computer program product for calculating a modified normalized Zernike expansion coefficient for an optical system of a patient, the computer program product comprising:
- code for accepting an original normalized Zernike expansion coefficient for the optical system, the original normalized Zernike expansion coefficient associated with a first pupil dimension;
- code for calculating the modified normalized Zernike expansion coefficient for the optical system, the modified normalized Zernike expansion coefficient associated with a second pupil dimension, wherein the second pupil dimension is greater than the first pupil dimension, and wherein the modified normalized Zernike expansion coefficient is calculated based on the original normalized Zernike expansion coefficient scaled by a scaling factor, the scaling factor comprising a ratio of the second pupil dimension to the first pupil dimension, the ratio raised to the power of a factor comprising a radial degree of the coefficient;
- code for determining a treatment for the optical system of the patient based on the modified normalized Zernike expansion coefficient, wherein the treatment comprises a member selected from the group consisting of an intraocular lens treatment, a contact lens treatment, and a refractive laser treatment;
- and
- a computer-readable medium for storing the codes.
Dependencies are inferred from the claim text.