Determination of the effective lens position of an intraocular lens using aphakic refractive power
First Claim
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1. A method for determining the optical power of an intraocular lens to be inserted into the eye of a patient, the method comprising:
- receiving as an input from an input device an aphakic refractive power value of the patient'"'"'s eye;
determining, with a processor, an estimate of the post-surgical effective lens position (ELP) of the intraocular lens for the patient'"'"'s eye, the estimate being based on the aphakic refractive power value of the patient'"'"'s eye and on a relationship between aphakic refractive power and post-surgical intraocular lens ELP; and
determining an amount of optical power for the intraocular lens to be inserted into the patient'"'"'s eye based on the estimate of the post-surgical ELP of the intraocular lens in the patient'"'"'s eye.
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Abstract
An ophthalmic method for determining a relationship between aphakic ocular power and estimated effective lens position (ELP) of an intraocular lens (IOL) to be implanted in a patient'"'"'s eye. The method can be used to determine an estimate of the ELP of an IOL given the aphakic ocular power of the patient'"'"'s eye, for example, without measurement of the corneal curvature or axial length of the patient'"'"'s eye. The estimate of ELP can then be used to determine a suitable value of optical power for the IOL to be implanted in the patient'"'"'s eye.
259 Citations
36 Claims
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1. A method for determining the optical power of an intraocular lens to be inserted into the eye of a patient, the method comprising:
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receiving as an input from an input device an aphakic refractive power value of the patient'"'"'s eye; determining, with a processor, an estimate of the post-surgical effective lens position (ELP) of the intraocular lens for the patient'"'"'s eye, the estimate being based on the aphakic refractive power value of the patient'"'"'s eye and on a relationship between aphakic refractive power and post-surgical intraocular lens ELP; and determining an amount of optical power for the intraocular lens to be inserted into the patient'"'"'s eye based on the estimate of the post-surgical ELP of the intraocular lens in the patient'"'"'s eye. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A non-transitory machine-readable medium that, when read by a machine, causes the machine to perform a method comprising:
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receiving as an input an indication of the aphakic refractive power value of the patient'"'"'s eye; determining an estimate of the post-surgical effective lens position (ELP) of the intraocular lens based on the aphakic refractive power value of the patient'"'"'s eye and on a relationship between aphakic refractive power and intraocular lens ELP; and determining an appropriate amount of optical power for the intraocular lens to be inserted into the eye of the patient based on the estimate of the post-surgical ELP of the intraocular lens.
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14. An ophthalmic method for determining a relationship between post-surgical effective lens position (ELP) of an intraocular lens and aphakic ocular power, the method comprising:
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obtaining from an input device a plurality of aphakic power values of a respective plurality of eyes; determining a plurality of post-surgical ELP values of an intraocular lens for the respective plurality of eyes; and determining a relationship between the plurality of aphakic power values and the plurality of post-surgical ELP values using a processor. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An ophthalmic instrument comprising:
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a measurement device for measuring the aphakic power of a patient'"'"'s eye; and a processor for performing a method comprising, receiving an aphakic refractive power value of the patient'"'"'s eye from the measurement device, determining an estimate of the post-surgical effective lens position (ELP) of an intraocular lens to be inserted in the patient'"'"'s eye, the estimate of the post-surgical ELP of the intraocular lens being based on the aphakic refractive power value of the patient'"'"'s eye and a general relationship between aphakic refractive power and intraocular lens ELP, and determining an appropriate amount of optical power for the intraocular lens to be inserted into the patient'"'"'s eye based on the estimate of the post-surgical ELP of the intraocular lens. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification