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 performing a prescriptive treatment on an optical system of a patient, through 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;
- 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
- performing the prescriptive treatment according to the treatment determined, wherein the prescriptive 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 performing a prescriptive treatment on an optical system of a patient, the system comprising:
- a memory;
- an input device;
- and
- a processor communicatively coupled to the memory and the input device, wherein the processor:
- receives, using the input device, 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;
- calculates 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;
- determines 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
- controls a treatment device to perform the prescriptive treatment of the optical system of the patient according to the treatment determined, wherein the prescriptive treatment comprises a member selected from the group consisting of an intraocular lens treatment, a contact lens treatment, and a refractive laser treatment.
A non-transitory computer readable storage medium that stores instructions that when executed by a processor cause the processor to:
- an original normalized Zernike expansion coefficient for an optical system of a 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, 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;
- determine a treatment for the optical system of the patient based on the modified normalized Zernike expansion coefficient,
- control a treatment device to perform a prescriptive treatment of the optical system of the patient according to the treatment determined, wherein the prescriptive treatment comprises a member selected from the group consisting of an intraocular lens treatment, a contact lens treatment, and a refractive laser treatment.
Dependencies are inferred from the claim text.