Determination of the effective lens position of an intraocular lens using aphakic refractive power
AssigneeWaveTec Vision Systems, Inc.
InventorsThomas D. Padrick, Jack T. Holladay
Life of this patent
Estimating the term…
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.
Claims24
1-36. (canceled)
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, a value that indicates the aphakic refractive power 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 value that indicates the aphakic refractive power of the patient's eye;
- 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.
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:
- obtaining, from an input device, a plurality of values that indicate the aphakic power of a respective plurality of eyes;
- determining a plurality of values that indicate the post-surgical ELP of an intraocular lens for the respective plurality of eyes;
- and
- determining a relationship between the aphakic power and the post-surgical ELP using a processor.
An ophthalmic instrument comprising:
- a measurement device for measuring the aphakic power of a patient's eye;
- and
- a processor for performing a method comprising,
- receiving a value that indicates the aphakic refractive power 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 value that indicates the aphakic refractive power of the patient's eye, 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.
Dependencies are inferred from the claim text.