Presbyopia correction using patient data
First Claim
Patent Images
1. A system for treating existing and/or potential presbyopia a patient, the patient having an eye with a pupil, a change in viewing distance with the eye inducing a change in pupil dimension, the system comprising:
- a device for measuring a first dimension of the pupil while the eye is viewing at a first viewing distance;
a prescription generating module having an input accepting a desired power for the eye and the first dimension, the module comprising a tangible medium embodying machine-readable code for determining a prescription for the eye providing a first desired power when the pupil has the first dimension, the prescription effecting a desired change in power in response to the change in pupil dimension, the desired change in power mitigating the presbyopia.
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Abstract
Methods, devices, and systems establish an optical surface shape that mitigates or treats presbyopia in a particular patient. The combination of distance vision and near vision in a patient can be improved, often based on input patient parameters such as pupil size, residual accommodation, and power need. Iterative optimization may generate a customized corrective optical shape for the patient.
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Citations
56 Claims
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1. A system for treating existing and/or potential presbyopia a patient, the patient having an eye with a pupil, a change in viewing distance with the eye inducing a change in pupil dimension, the system comprising:
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a device for measuring a first dimension of the pupil while the eye is viewing at a first viewing distance; a prescription generating module having an input accepting a desired power for the eye and the first dimension, the module comprising a tangible medium embodying machine-readable code for determining a prescription for the eye providing a first desired power when the pupil has the first dimension, the prescription effecting a desired change in power in response to the change in pupil dimension, the desired change in power mitigating the presbyopia. - View Dependent Claims (2)
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3. A method for determining a prescription that mitigates or treats presbyopia in a particular patient, the method comprising:
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(a) selecting a goal function appropriate for presbyopia of an eye; (b) inputting a set of patient parameters specific for the particular patient; and (c) determining an optical shape for the particular patient appropriate for differing viewing conditions based on the set of patient parameters per the goal function so as to mitigate or treat the presbyopia in the patient. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for establishing a prescription that mitigates or treats presbyopia of an eye in a particular patient, the method comprising:
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(a) inputting a set of patient parameters specific for the particular patient into an optimizer module comprising a tangible medium embodying machine-readable code; and (b) deriving a prescription for the particular patient with the machine-readable code of the optimizer module per a goal function, the goal function related to a plurality of viewing conditions, so as to mitigate or treat the presbyopia in the patient. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A method for treating or mitigating presbyopia in a particular patient, the method comprising:
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(a) selecting a goal function appropriate for presbyopia of an eye; (b) inputting a set of patient parameters specific for the particular patient; (c) determining an optical shape for the particular patient based on the set of patient parameters per the goal function; and (d) mitigating or treating the presbyopia in the patient by administering to the patient a procedure selected from the group consisting of; (i) ablating a corneal surface of the patient to provide a corneal shape that corresponds to the optical shape, (ii) providing the patient with a contact lens or spectacle lens that has a shape that corresponds to the optical shape, and (iii) providing the patient with an intra-ocular lens that has a shape that corresponds to the optical shape.
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24. A system for establishing a prescription that mitigates or treats presbyopia in a particular patient, the system comprising:
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(a) an input that accepts a set of patient parameters; and (b) an optimizer module comprising a tangible medium embodying machine-readable code that determines the prescription for the particular patient based on the set of patient parameters, using a goal function appropriate for presbyopia of an eye. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A system for reprofiling a surface of a cornea of an eye of a particular patient from a first shape to a second shape having correctively improved optical properties, the system comprising:
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(a) an input that accepts a set of patient parameters; (b) a module comprising a tangible medium embodying machine-readable code that determines an optical shape for the particular patient based on the set of patient parameters, using a goal function appropriate for presbyopia of an eye; (c) a processor that generates an ablation profile; and (d) a laser system that directs laser energy onto the cornea according to the ablation profile so as to reprofile a surface of the cornea from the first shape to the second shape, the second shape corresponding to the determined optical shape.
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39. A method for defining a prescription for treating presbyopia in a particular patient, the method comprising:
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(a) providing an optical shape configured to treat the vision condition; (b) determining a pupil diameter of the particular patient; and (c) defining a prescription shape comprising a central portion, the central portion having a dimension within a range between about 0.35 and about 0.55 of the pupil diameter, the prescription shape based on; (i) the pupil diameter; (ii) an inner region of the optical shape; and (iii) an attribute of at least one eye previously treated with the optical shape. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A system for scaling a prescription shape that treats a vision condition in a particular patient, the system comprising:
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(a) an input that accepts a prescriptive shape specific for treating the vision condition; (b) an input that accepts a pupil dimension of the particular patient; and (c) a module comprising a tangible medium embodying machine-readable code that scales a central portion of the prescription shape based on the pupil dimension of the particular patient and an attribute of at least one eye previously treated with the prescriptive shape such that the prescription shape ameliorates an indication of the vision condition of the particular patient, and such that the central portion has dimension between about 0.35 and about 0.55 of the pupil diameter. - View Dependent Claims (51)
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52. A method for treating presbyopia of an eye of a patient, the method comprising:
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identifying a first pupil size of the eye under a first viewing condition; identifying a second pupil size of the eye under a second viewing condition; and calculating a presbyopia-mitigating prescription for the eye in response to the pupil sizes so that the eye has a first power suitable for the first viewing condition at the first size and so that the eye has a second power suitable for the second viewing condition at the second size, wherein calculating the prescription comprises determining at least one coefficient of a set of Zernike polynomials. - View Dependent Claims (53)
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54. A method for determining an effective power of an eye under a viewing condition, the method comprising;
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determining a plurality of coefficients of a Zernike polynomial expansion from a wave front of an eye while the eye has a first pupil size; determining a second pupil size of the pupil under the viewing condition; calculating the effective power of the eye from at least one of the coefficients of the Zernike polynomial from a relationship between effective power and pupil size.
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55. A system for deriving a prescription for an eye, the system comprising:
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a polynomial expansion module having an input for a wavefront of an eye and an output for a polynomial expansion, the polynomial expansion module comprising a tangible medium embodying machine-readable code that determines the polynomial expansion from the wavefront of the eye; an effective power module having an input coupled to the output of the polynomial expansion module and an output, the effective power module comprising a tangible medium embodying machine-readable code that determines an effective power from the polynomial expansion; and a prescription module coupled to the effective power module, the prescription module comprising a tangible medium embodying machine-readable code that generates the prescription so as to provide a plurality of different desired effective powers at an associated plurality of different viewing pupil sizes.
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56. A system for determining an effective power of an eye under a viewing condition, the system comprising;
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a first input for a plurality of coefficients of a Zernike polynomial expansion from a wavefront of an eye while the eye has a first pupil size; a second input for a second pupil size of the pupil under the viewing condition; an effective power calculating module comprising a tangible medium embodying machine-readable code that calculates the effective power of the eye from at least one of the coefficients of the Zernike polynomial and a relationship between effective power and pupil size.
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Specification