SYSTEMS AND METHODS FOR DETERMINING INTRAOCULAR LENS POWER
First Claim
1. A method of selecting an intraocular lens or an optical power thereof, comprising:
 providing an eye comprising a cornea and a retina;
determining a value of an axial length of an eye, the axial length being equal to a distance from the apex to a surface of the retina;
calculating, based on a mathematical relationship, a distance from the apex to a plane the intraocular lens after an ocular surgical procedure;
calculating an optical power of the intraocular lens suitable for providing a predetermined refractive outcome;
wherein the mathematical relationship comprises a dependent variable that varies with a value of an independent variable, the independent variable having a base value corresponding to the determined axial length;
wherein the mathematical relationship has a sensitivity of less than or equal to 0.5%, the sensitivity being defined as a percent variation in the dependent variable for a 1% in the base value.
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Accused Products
Abstract
A system for providing an intraocular lens includes a processor and a computer readable memory. The computer readable memory is configured to communicate with the processor, the memory having stored therein at least one of: one or more ocular dimensions, and at least one predetermined refractive outcome. The memory further includes a sequence of instructions which, when executed by the processor, cause the processor to select an intraocular lens, select a power of an intraocular lens, or provide an intraocular lens. The sequence of instructions includes determining one or more dimensions of an eye. The instructions also include calculating, based on a mathematical relationship, a distance from an apex of a cornea of the eye to an apex or plane of the intraocular lens after insertion into the eye. The instructions further calculating an optical power of the intraocular lens suitable for providing a predetermined refractive outcome. The mathematical relationship includes an axial length of the eye, an anterior chamber depth of the natural crystalline lens, and a corneal radius of the eye, but is independent of a thickness of the natural crystalline lens.
54 Citations
25 Claims

1. A method of selecting an intraocular lens or an optical power thereof, comprising:

providing an eye comprising a cornea and a retina; determining a value of an axial length of an eye, the axial length being equal to a distance from the apex to a surface of the retina; calculating, based on a mathematical relationship, a distance from the apex to a plane the intraocular lens after an ocular surgical procedure; calculating an optical power of the intraocular lens suitable for providing a predetermined refractive outcome; wherein the mathematical relationship comprises a dependent variable that varies with a value of an independent variable, the independent variable having a base value corresponding to the determined axial length; wherein the mathematical relationship has a sensitivity of less than or equal to 0.5%, the sensitivity being defined as a percent variation in the dependent variable for a 1% in the base value.  View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)


16. A system for providing an intraocular lens, the system comprising:

a processor; and a computer readable memory configured to communicate with the processor, the memory having stored therein; an array of ordered values, including at least one of; one or more ocular dimensions, the ocular dimensions including an axial length of an eye having a cornea with an apex and a retina surface, the axial length being equal to a first distance from the apex to the retina surface; a predetermined refractive outcome; a sequence of instructions which, when executed by the processor, cause the processor to select an intraocular lens, select an optical power of the intraocular lens, or provide the intraocular lens, the sequence of instructions including; calculating, based on a mathematical relationship, a second distance from the apex to an apex or a plane of the intraocular lens when the intraocular lens is inserted into the eye; calculating an optical power of the intraocular lens suitable for providing the predetermined refractive outcome; wherein the mathematical relationship comprises a dependent variable that varies with a value of an independent variable, the independent variable having a base value corresponding to the axial length of the eye; wherein the mathematical relationship has a sensitivity of less than or equal to 0.5%, the sensitivity defined as a percent variation in the dependent variable for a 1% increase of the independent variable from the base value.


17. A system for providing an intraocular lens, the system comprising:

a processor; and a computer readable memory configured to communicate with the processor, the memory having stored therein; an array of ordered values, including at least one of; one or more ocular dimensions of an eye having a cornea with an apex and a retina surface; a predetermined refractive outcome; a sequence of instructions which, when executed by the processor, cause the processor to select an intraocular lens, select an optical power of the intraocular lens, or provide the intraocular lens, the sequence of instructions including; calculating, based on a mathematical relationship, a distance from the apex to an apex or plane of the intraocular lens when the intraocular lens is inserted into the eye; calculating an optical power of the intraocular lens suitable for providing the predetermined refractive outcome; wherein the mathematical relationship includes an independent variable that depends on an axial length of the eye, AL, an anterior chamber depth of the natural crystalline lens, ACD_{pre}, and a corneal radius of the eye, CR, but is independent of a thickness of the natural crystalline lens, LT.  View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)

1 Specification