Presbyopic vision improvement
First Claim
1. A method for designing either of a customized multifocal translating style alternating vision contact lens or a simultaneous vision style correcting lens to a patient, comprising the steps of:
- positioning a multifocal trial lens with respect to the patient'"'"'s eye that is representative of the lens to be provided, having a correction of approximately a distance defocus power of the patient'"'"'s eye;
making a first wavefront aberration measurement of the patient'"'"'s eye with the positioned trial lens at a viewing distance of optical infinity;
making a second wavefront aberration measurement of the patient'"'"'s eye with the trial lens in position, at an artificial optical near point viewing distance; and
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using the first and second wavefront aberration measurements to approximate a best form wavefront correction to be applied to the contact lens.
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Accused Products
Abstract
A method of designing a contact lens or other correction for providing presbyopia correction to a patient relies on wavefront aberration measurement data for providing a best form correction. Preferably the correction is in the form of a multifocal translating style alternating vision contact lens or a simultaneous vision style correcting lens. A method for designing a correction for improving a person'"'"'s vision is directed to correcting higher order aberrations in such a manner that a residual amount of the higher-order rotationally symmetric aberration is greater than a residual amount of the higher-order rotationally asymmetric aberration after the correction. A design method according to the invention is directed to correcting asymmetric higher order aberrations induced by decentering of a multifocal contact lens that has residual spherical aberration which provides increased depth of field.
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Citations
35 Claims
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1. A method for designing either of a customized multifocal translating style alternating vision contact lens or a simultaneous vision style correcting lens to a patient, comprising the steps of:
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positioning a multifocal trial lens with respect to the patient'"'"'s eye that is representative of the lens to be provided, having a correction of approximately a distance defocus power of the patient'"'"'s eye;
making a first wavefront aberration measurement of the patient'"'"'s eye with the positioned trial lens at a viewing distance of optical infinity;
making a second wavefront aberration measurement of the patient'"'"'s eye with the trial lens in position, at an artificial optical near point viewing distance; and
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using the first and second wavefront aberration measurements to approximate a best form wavefront correction to be applied to the contact lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for designing a correction for improving a person'"'"'s vision that is deteriorated by optical aberrations including higher-order rotationally symmetric and rotationally asymmetric aberrations, comprising the steps of:
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designing a correction for the higher-order rotationally symmetric aberration; and
designing a correction for the higher-order rotationally asymmetric aberration, wherein a residual amount of the higher-order rotationally symmetric aberration is greater than a residual amount of the higher-order rotationally asymmetric aberration after the correction. - View Dependent Claims (17, 18)
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- 19. In a method for designing a correction for improving a person'"'"'s vision wherein only a rotationally symmetric surface is available upon which to impart an aberration correction, the improvement comprising providing only a partial correction of a total amount of a rotationally symmetric aberration in the presence of an amount of a non-rotationally symmetric aberration.
- 21. A method for designing a correction for improving a person'"'"'s vision, comprising using a wavefront sensor output to approximate a best form wavefront correction to be applied to a multi-focal correction so as to provide an optimum retinal image for a presbyopic condition.
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27. The method of 26, wherein a front surface mirror is utilized to induce the downgaze.
- 29. The method of 21, wherein the correction is a multi-focal vision altering optic in the form of a simultaneous style correcting lens element.
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32. The method of 29, wherein the stop of providing a trial lens comprises providing a trial lens having an amount of spherical aberration;
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further wherein the measuring step comprises measuring an amount of coma aberration; and
further comprising providing a wavefront aberration correction for the coma.
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Specification