Optical imaging and measurement systems and methods for cataract surgery and treatment planning

Abstract

An optical measurement system and apparatus for carrying out cataract diagnostics in an eye of a patient includes a Corneal Topography Subsystem, a wavefront aberrometer subsystem, and an eye structure imaging subsystem, wherein the subsystems have a shared optical axis, and each subsystem is operatively coupled to the others via a controller. The eye structure imaging subsystem is preferably a fourierdomain optical coherence tomographer, and more preferably, a swept source OCT.

1 - 19 . (canceled) 
     
     
         20 . A method of predicting the intraocular lens position comprising:
 providing an eye comprising a cornea and a retina;   determining a plurality of eye characteristics before cataract surgery, comprising ocular biometry information, anterior corneal surface information, posterior corneal surface information, anterior lens surface information, and posterior lens surface information, lens tilt information, lens thickness information and lens position information;   determining a plurality of eye characteristics after cataract surgery, comprising ocular biometry information, anterior corneal surface information, posterior corneal surface information, anterior IOL surface information, and posterior IOL surface information, IOL tilt information and IOL position and orientation information;   calculating or measuring, based on a mathematical relationship, a distance from the apex or from the retina to a plane of the intraocular lens after an ocular surgical procedure;   calculating an optical power of the intraocular lens suitable for providing at least one of a predetermined refractive outcome and a predetermined optical performance;   wherein a mathematical relationship is found between the preoperative and postoperative eye characteristics that accurately predicts the measured distance from the apex or from the retina to the plane where the intraocular lens is.   
     
     
         21 . A system for planning a refractive treatment of an eye of a patient, the system comprising:
 a memory operable to store eye measurement data comprising ocular biometry information, anterior corneal surface information, posterior corneal surface information, anterior lens surface information, and posterior lens surface information, lens tilt information, lens thickness information and lens position information;   a processor coupled to the memory, the processor deriving the treatment of the eye of the patient applying an effective treatment transfer function, wherein the effective treatment transfer function is derived from, for each of a plurality of prior eye treatments, a correlation between a pre-treatment vector characterizing the eye measurement data before treatment, and a post-treatment vector characterizing post-treatment eye measurement data of the associated eye;   an output coupled to the processor so as to transmit the treatment to facilitate improving refraction of the eye of the patient.   
     
     
         22 . The system of  claim 20 , wherein the processor comprises tangible media embodying machine readable instructions for implementing the derivation of the treatment. 
     
     
         23 . An improved method for planning a refractive treatment of an eye of a patient, the system comprising:
 measuring a plurality of ocular biometry information, anterior corneal surface information, posterior corneal surface information, anterior lens surface information, and posterior lens surface information, lens tilt information, lens thickness information and lens position information.   
     
     
         24 . A method of customizing at least one parameter of an intraocular lens, comprising:
 measuring a plurality of eye characteristics comprising ocular biometry information, anterior corneal surface information, posterior corneal surface information, anterior lens surface information, and posterior lens surface information, lens tilt information, lens thickness information and lens position information;   determining a desired postoperative condition of the eye;   empirically calculating a post-operative condition of the eye based at least partially on the measured eye characteristics; and   predictively estimating, in accordance with an output of said empirically calculating and the eye characteristics, the at least one parameter of the intraocular lens to obtain the desired postoperative condition.   
     
     
         25 . A method of adjusting the refraction in an eye of a patient who has undergone cataract surgery comprising:
 measuring a plurality of post-operative eye characteristics in an eye of a patient who has previously undergone cataract surgery, the eye characteristics comprising ocular biometry information, anterior corneal surface information, posterior corneal surface information, anterior lens surface information, and posterior lens surface information, lens tilt information and lens position information;   identifying a plurality of corrective procedure based at least partially on one of (1) a comparison of at least one measured pre-operative eye characteristic and the corresponding measured post-operative eye characteristic; and (2) a comparison of at least one predicted post-operative eye characteristic and the corresponding measured post-operative eye characteristic;   for each of a plurality of corrective procedures:
 modeling the subject eye with the corrective procedure; 
   modeling the subject eye based on the corrective procedure;   performing one of a ray tracing and a power calculation based on said eye model; and   selecting a corrective procedure from the plurality of IOL models corresponding to the optimized IOL based on a predetermined criteria.   
     
     
         26 - 31 . (canceled)