Intraocular lens derivation system
AssigneeBausch & Lomb Incorporated
InventorsTimothy N. Turner, Charles R. Broadus
Life of this patent
Estimating the term…
Abstract
An intraocular lens derivation system 10 includes an eye surface measurement device 12 for measuring the shape and position of at least the anterior and a posterior corneal surfaces of the eye, a length measurement device 14 for measuring at least the axial length of the eye, and an IOL calculator 24, connected to devices 12 and 14, for accurately selecting the proper IOL using at least in the selection the measured anterior and posterior corneal surface information and the axial length of the eye.
Claims32
An intraocular lens derivation system comprising:
- an eye surface measurement device for measuring an anterior segment of a patient's eye including an anterior and posterior corneal surface of the eye;
- an eye length measurement device for measuring an axial length of the eye, a crystalline lens thickness and position, and a corneal thickness;
- an eye modeler connected to each of the measurement devices for deriving a model of the eye based on the measured anterior and posterior corneal surfaces, the measured crystalline lens thickness and position, the measured axial length, the corneal thickness, and an IOL model;
- an IOL database for providing a technical description of the IOL model for use in the eye modeler;
- an optical evaluator for evaluating a plurality of eye models each including the model of a different IOL;
- and
- a metric for determining the success of the optical evaluation.
An intraocular lens evaluation system comprising:
- an eye surface measurement device for measuring an anterior chamber of a patient's eye including an anterior and a posterior corneal shape of the eye, and an anterior chamber depth of the eye;
- an eye length measurement device for measuring length of the eye and a lens thickness;
- an intraocular lens (IOL) calculator operably connected to each of the eye measurement device and the eye length measurement device for calculating an IOL for the eye, using at least the measured anterior and posterior shape, the anterior chamber depth, and the length of the eye in the calculation;
- and
- an eye modeler operably connected to each of the measurement devices and the calculator for modeling the eye based on the measured anterior and posterior corneal shape, the anterior chamber depth, the measured eye length, the lens thickness, and the calculated IOL;
- and
- an evaluator for evaluating an eye model.
An IOL calculator system comprising:
- an eye surface measurement device for measuring at least an anterior and a posterior corneal shape of an eye, and an anterior chamber depth of the eye;
- and
- an intraocular lens calculator operably connected to the eye measurement device for accurately calculating an IOL for the eye, using at least the measured anterior and posterior corneal shape and an axial-length of the eye in the calculation.
IOL calculator system comprising:
- an eye surface measurement device for measuring an anterior chamber of a patient's eye including an anterior and a posterior corneal shape of the eye, and an anterior chamber depth of the eye;
- an eye length measurement device for measuring an axial-length of the eye;
- and
- an IOL calculator operably connected to each of the eye measurement device and the eye length measurement device for accurately calculating a corrective lens for the eye, using at least the measured anterior and posterior shape, the anterior chamber depth, and the axial-length of the eye in the calculation.
A method of calculating an IOL power for a patient's eye, the method of comprising the steps of:
- measuring an anterior chamber of the eye including measuring an anterior and a posterior corneal shape of the eye and an anterior chamber depth;
- measuring an axial-length of the eye;
- calculating the IOL for the eye using at least the measured anterior and posterior corneal shape, the anterior chamber depth, and the axial-length of the eye;
- and
- deriving a keratometry (k) factor and a corneal radius of curvature (r) factor for use in a known IOL power calculation formula wherein the k and r factor are based on the measured anterior and posterior corneal curvature.
Dependencies are inferred from the claim text.