Method and system for pupil retro illumination using sample arm of oct interferometer

Abstract

An optical measurement instrument includes optical coherence tomography (OCT) interferometer and a pupil retro illumination system which directs laser light onto the retina of an eye via the sample arm of the OCT interferometer. The laser light passes through an intraocular lens (IOL) implanted into the eye, and an iris camera captures an image of the eye from a portion of the light returned from the retina of the eye, the returned light also passing through the IOL. One or more fiducials of the IOL are detected from the captured image, and an angular orientation of the eye is ascertained from the one or more detected fiducials.

1 . A system, comprising:
 a wavefront aberrometer configured to measure one or more characteristics of an eye into which an intraocular lens (IOL) has been implanted;   an optical coherence tomography (OCT) interferometer, the OCT interferometer including a sample path which is configured to direct an OCT probe beam into the eye and which is configured to receive a portion of the OCT probe beam back from the eye in order to perform an OCT measurement of the eye;   a pupil retro illumination light source configured to direct pupil retro illumination light to the retina of the eye via the sample path of the OCT interferometer;   an iris camera configure to capture an image of eye from the pupil retro illumination light returned from the pupil and passing through the IOL;   a processor configured to detect one or more fiducials of the IOL from the captured image, and from the detected one or more fiducials to ascertained an angular orientation of the IOL within the eye.   
     
     
         2 . The system of  claim 1 , wherein the wavefront aberrometer is configured to measure a magnitude of astigmatism of the eye and a refractive cylinder axis of the eye with the IOL implanted. 
     
     
         3 . The system of  claim 2 , wherein the processor is provided with an cylinder power of the IOL, and wherein the processor is configured to determine from the measured magnitude of the astigmatism of the eye, the measured refractive cylinder axis of the eye, and the cylinder power of the IOL an angular orientation at which the IOL should have been disposed within the eye to produce optimal vision. 
     
     
         4 . The system of  claim 1 , wherein the OCT interferometer is configured to determine from the OCT measurement of the eye a position of the implanted IOL within the eye. 
     
     
         5 . The system of  claim 1 , further comprising a corneal topographer and a structure having an aperture therethrough, wherein the sample path directs the probe beam to the eye through the aperture, and wherein all of the wavefront aberrometer, the corneal topographer, the OCT interferometer, and the pupil retro illumination light source direct light to the eye through the aperture. 
     
     
         6 . The system of  claim 1 , wherein the sample path includes a Z-axis telescope configured to focus the OCT probe beam at a desired depth within the eye. 
     
     
         7 . The system of  claim 1 , wherein the sample path includes a scanner configured to scan the OCT probe beam in X and Y directions to span an X-Y OCT measurement space in the eye. 
     
     
         8 . The system of  claim 1 , wherein the processor is configured to detect the one or more fiducials of the IOL from the captured image by detecting one or more dark spots in the captured image. 
     
     
         9 - 16 . (canceled)