Customized multifocal ophthalmic lens

Abstract

System and method for customizing multifocal ophthalmic lenses, such as an intraocular lens (IOL) or the like, that may be tailored for an individual patient or group of patients beyond the selection of a particular IOL power. One or more eye factors of the patient are determined, a set of different multifocal intraocular lenses having a similar base power are determined based on the eye factors, and a multifocal intraocular lens is selected for the patient from the set based on the eye factors.

What is claimed is: 
     
         1 . A system ( 50 ) for producing a custom intraocular lens for a patient, the system comprising:
 a memory ( 52 ) configured to store a first database of lifestyle parameters, a second database of eye factors, and a third database of multifocal intraocular lenses;   a processor ( 56 ) coupled to the memory and configured to:
 determine an add power based on the first database and the second database; and 
 select the custom intraocular lens from the third database based on the add power. 
   
     
     
         2 . The system of  claim 1 , wherein the processor is further configured to:
 apply a predetermined weighting to the lifestyle parameters of the first database and the eye factors of the second database to produce a first weighted database of lifestyle parameters and a second weighted database of eye factors; and   determine the add power based on the first weighted database and the second weighted database.   
     
     
         3 . The system of  claim 1 , wherein at least some of the multifocal intraocular lenses have a first intraocular lens power, and wherein at least some of the multifocal intraocular lenses have different optical characteristics, and wherein the custom intraocular lens is configured to mitigate a presbyopia of the particular patient. 
     
     
         4 . The system of  claim 1 , wherein the first database comprises a preferred reading distance of the patient. 
     
     
         5 . The system of  claim 4 , wherein the second database comprises an axial length of an eye, and wherein the processor is further configured to determine the add power based on the preferred reading distance and the axial length of the eye. 
     
     
         6 . The system of  claim 1 , wherein the second database comprises one or more eye factors selected from a group consisting of a corneal shape of an eye, a pupil diameter of an eye for a predetermined viewing condition, a set of pupil diameters of an eye under a set of predetermined viewing conditions, an axial length of an eye, a keratometry factor, and a corneal radius of curvature factor. 
     
     
         7 . The system of  claim 1 , wherein the processor is further configured to select the custom intraocular lens from the third database based on the add power and a treatment to an eye, the treatment subsequent to an insertion of the custom intraocular lens into the eye. 
     
     
         8 . The system of  claim 7 , wherein the custom intraocular lens has one or more characteristics, and wherein the treatment comprises an adjustment to at least one of the one or more characteristics of the custom intraocular lens. 
     
     
         9 . The system of  claim 7 , wherein the eye with the custom intraocular lens has a refraction, and wherein the treatment comprises an adjustment to the refraction. 
     
     
         10 . The system of  claim 7 , wherein the treatment comprises a laser assisted refractive ophthalmic surgery. 
     
     
         11 . A system ( 50 ) for producing a custom multifocal intraocular lens having a diffractive surface with one or more echelettes, the system comprising:
 a memory ( 52 ) configured to store a first database of lifestyle parameters and a second database of eye factors;   a processor ( 58 ) coupled to the memory and configured to:
 determine at least one characteristic of the one or more echelettes based on the first database and the second database; and 
 select a diffractive multifocal intraocular lens based on the at least one characteristic. 
   
     
     
         12 . The system of  claim 11 , wherein the at least one characteristic comprises one or more characteristics selected from a group consisting of one or more heights of the one or more echelettes, one or more diameters of the one or more echelettes, and one or more profile shapes of the one or more echelettes. 
     
     
         13 . The system of  claim 11 , wherein the second database comprises one or more eye factors selected from a group consisting of a corneal shape of an eye, a pupil diameter of the eye for a predetermined viewing condition, an axial length of the eye, a keratometry factor, and a corneal radius of curvature factor. 
     
     
         14 . The system of  claim 11 , wherein the first database comprises a preferred reading distance, wherein the second database comprises an axial length of an eye, and wherein the processor is further configured to determine the at least one characteristic in response to the preferred reading distance and the axial length of the eye. 
     
     
         15 . The system of  claim 11 , wherein the processor is further configured to select the diffractive multifocal intraocular lens based on the at least one characteristic and a treatment to an eye, the treatment subsequent to an insertion of the diffractive multifocal intraocular lens into the eye. 
     
     
         16 . The system of  claim 15 , wherein the diffractive multifocal intraocular lens has one or more characteristics, and wherein the treatment comprises an adjustment to at least one of the one or more characteristics of the diffractive multifocal intraocular lens. 
     
     
         17 . The system of  claim 15 , wherein the eye with the diffractive multifocal intraocular lens has a refraction, and wherein the treatment comprises an adjustment to the refraction. 
     
     
         18 . The system of  claim 15 , wherein the treatment comprises a laser assisted refractive ophthalmic surgery. 
     
     
         19 . A method of producing a multifocal intraocular lens for a patient, the method comprising the steps of:
 determining one or more eye factors of the patient;   determining a set of different multifocal intraocular lenses based on the one or more eye factors of the patient, the set of multifocal intraocular lenses having a similar base power; and   selecting the multifocal intraocular lens for the patient from the set of multifocal intraocular lenses based on the one or more eye factors of the patient.   
     
     
         20 . The method of  claim 19 , wherein at least some multifocal intraocular lenses of the set of multifocal intraocular lenses have central portions with associated sizes and add powers, and wherein the step of selecting comprises selecting a first multifocal intraocular lens from the set of multifocal intraocular lenses, the first multifocal intraocular lens has a central portion and an add power both based on the one or more eye factors of the patient. 
     
     
         21 . The method of  claim 19 , wherein the selecting step comprises selecting a diffractive multifocal intraocular lens for the patient from the set of multifocal intraocular lenses based on the one or more eye factors of the patient. 
     
     
         22 . The method of  claim 19 , further comprising determining an add power of the multifocal intraocular lens for the patient based on one or more lifestyle parameters of the patient and the one or more eye factors of the patient, and wherein the selecting step comprises selecting the multifocal intraocular lens for the patient based on the add power. 
     
     
         23 . The method of  claim 22 , wherein the one or more eye factors comprise an axial length of the eye, and wherein the step of determining an add power comprises determining the add power based on one or more of eye factors selected from a group consisting of a corneal shape of the eye, a pupil diameter of the eye for a predetermined viewing condition, a keratometry factor, a corneal radius of curvature factor, a preferred reading distance and the axial length of the eye. 
     
     
         24 . The method of  claim 19 , wherein the multifocal intraocular lens for the patient has a diffractive surface with one or more echelettes, wherein the method further comprises determining at least one characteristic of one or more echelettes based on a set of lifestyle parameters of the patient and an eye factor of the patient, and wherein the selecting step comprises selecting the diffractive multifocal intraocular lens from the set of multifocal intraocular lenses based on the at least one characteristic of the one or more echelettes. 
     
     
         25 . The method of  claim 24 , wherein the at least one characteristic comprises one or more characteristics selected from a group consisting of one or more heights of the one or more echelettes, one or more diameters of the one or more echelettes, and one or more profile shapes of the one or more echelettes. 
     
     
         26 . The method of  claim 19 , further comprising determining at least one patient lifestyle parameter of the patient, and wherein the selecting step comprises selecting one or more multifocal lens parameters for the multifocal intraocular lens based on the at least one lifestyle parameter and the one or more eye factors. 
     
     
         27 . The method of  claim 26 , wherein the one or more multifocal lens parameters comprises one or more parameters selected from a group consisting of an add power amount, a depth of focus characteristic, an aberration amount selected to at least partially correct for an aberration of the cornea of the eye, a spectral transmission characteristic, and a pupil dependent add power function. 
     
     
         28 . The method of  claim 26 , wherein the one or more eye factors comprises one or more factors selected from a group consisting of a patient age, a corneal shape, a cataract grade, an estimated postoperative pupil diameter of the eye for a predetermined viewing condition, and a pre-existing intraocular lens. 
     
     
         29 . The method of  claim 26 , wherein the at least one lifestyle parameter comprises one or more parameters selected from a group consisting of an amount of outdoor activity, an amount of reading time, an amount of computer time, and a work environment. 
     
     
         30 . The method of  claim 19 , wherein the selecting step further comprises selecting the multifocal intraocular lens based on the one or more eye factors and a treatment to an eye subsequent to an insertion of the multifocal intraocular lens into the eye. 
     
     
         31 . The method of  claim 19 , wherein the multifocal intraocular lens has one or more characteristics, and wherein the selecting step further comprises selecting multifocal intraocular lens based on the one or more eye factors and a treatment to an eye subsequent to an insertion of the multifocal intraocular lens into the eye, the treatment comprising an adjustment to at least one of the one or more characteristics of the multifocal intraocular lens. 
     
     
         32 . The method of  claim 19 , wherein the eye with the multifocal intraocular lens has a refraction, and wherein the selecting step further comprises selecting the multifocal intraocular lens based on the one or more eye factors and a treatment to an eye subsequent to an insertion of the multifocal intraocular lens into the eye, the treatment comprising an adjustment to the refraction. 
     
     
         33 . The method of  claim 19 , wherein the selecting step further comprises selecting the multifocal intraocular lens based on the one or more eye factors and a treatment to an eye subsequent to an insertion of the multifocal intraocular lens into the eye, the treatment comprising a laser assisted refractive ophthalmic surgery.