# US 10,864,075 B2 · Intraocular lens visualization and tracking system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,864,075 B2 - Document ID: US10864075B2 - Status: Granted - Kind: B2 - Application number: 15/859,653 - Filed: 2017-12-31 - Published: 2019-07-04 - Granted: 2020-12-15 - Earliest claimed: 2017-12-31 - Assignees: RxSight, Inc. - Applicants: RxSight, Inc. - Inventors: John Kondis - Web page: https://patentgrep.com/patent/US10864075B2 ## CPC - A61F 2/16: Intraocular lenses - G02B 21/06: Means for illuminating specimens - G02B 21/20: Binocular arrangements - G02B 27/0093: {with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking} - A61F 2250/0001: Means for transferring electromagnetic energy to implants - G02B 21/365: {Control or image processing arrangements for digital or video microscopes (G02B21/361, G02B21/362 take precedence)} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract An ophthalmic visualization system includes a rear illumination system, to generate and to project a rear illumination light onto a retina of an eye that has an intraocular lens (IOL) implanted into the eye, so that the rear illumination light reflects from the retina as a reflected illumination light, wherein a central portion of the reflected illumination light propagates through the IOL to form an IOL-focused illumination light, and a peripheral portion of the reflected illumination light propagates around the IOL to form a peripheral illumination light; an optic, to receive the IOL-focused illumination light and the peripheral illumination light from the eye, and to transmit the received illumination lights; an aperture slop, to stop the transmitted peripheral illumination light, and to allow the IOL-focused illumination light to pass through; and an imaging system, to form an isolated IOL image based on the transmitted IOL-focused illumination light. ## Claims ### Claim 1 An ophthalmic visualization system, comprising: a rear illumination system, to generate and to project a rear illumination light onto a retina of an eye that has an intraocular lens (IOL) implanted into the eye, so that the rear illumination light reflects from the retina as a reflected illumination light, wherein a central portion of the reflected illumination light propagates through the IOL to form an IOL-focused illumination light, and a peripheral portion of the reflected illumination light propagates around the IOL to form a peripheral illumination light; an optic, to receive the IOL-focused illumination light and the peripheral illumination light from the eye, and to transmit the received illumination lights; an aperture stop, to stop the transmitted peripheral illumination light, and to allow the IOL-focused illumination light to pass through; and an imaging system, to form an isolated IOL image based on the transmitted IOL-focused illumination light. ### Claim 2 (depends on 1) The ophthalmic visualization system of claim 1, the rear illumination system comprising: an illumination light source, positioned off an optical path of the optic, to generate the rear illumination light; and an illumination light beam splitter, to redirect the generated rear illumination light from the illumination light source into the optical path of the optic. ### Claim 3 (depends on 1) The ophthalmic visualization system of claim 1, wherein: the rear illumination light source is configured to generate one of a red and an infrared rear illumination light. ### Claim 4 (depends on 1) The ophthalmic visualization system of claim 1, wherein: the aperture stop is positioned at a location where the peripheral illumination light and the IOL-focused illumination light are spatially separated. ### Claim 5 (depends on 1) The ophthalmic visualization system of claim 1, wherein: the aperture stop is positioned at a location where the peripheral illumination light forms an annulus around and distinct from the IOL-focused illumination light. ### Claim 6 (depends on 1) The ophthalmic visualization system of claim 1, the imaging system comprising: a camera, to determine a location of the IOL from the isolated IOL image in an optic reference frame. ### Claim 7 (depends on 6) The ophthalmic visualization system of claim 6, the camera comprising: an image processor, to track a shift of the location of the IOL in the optic reference frame. ### Claim 8 (depends on 7) The ophthalmic visualization system of claim 7, wherein: the image processor is configured to track the shift of the location of the IOL by determining a cross-correlation using an image of a disk as a kernel. ### Claim 9 (depends on 1) The ophthalmic visualization system of claim 1, the imaging system comprising: a binocular microscope, to form the isolated IOL image. ### Claim 10 (depends on 9) The ophthalmic visualization system of claim 9, wherein: the optic is configured to form, from the reflected illumination light, a first eye stereo beam for a first eyepiece of the binocular microscope, and a second eye stereo beam for a second eyepiece of the binocular microscope; and the aperture stop is positioned at a location where the peripheral illumination light and the IOL-focused illumination light of one of the first eye stereo beam and the second eye stereo beam are one of partially spatially shifted, and fully spatially shifted. ### Claim 11 (depends on 1) The ophthalmic visualization system of claim 1, wherein: an object plane of the imaging system is within a 3 mm vicinity of a plane of the IOL implanted in the eye. ### Claim 12 (depends on 1) The ophthalmic visualization system of claim 1, wherein: an object plane of the imaging system is within a 1 mm vicinity of a plane of the IOL implanted in the eye. ### Claim 13 (depends on 1) The ophthalmic visualization system of claim 1, comprising: a treatment light source, positioned off an optical path of the optic, to generate a treatment light; and a treatment light beam splitter, to redirect the generated treatment light from the treatment light source into the optical path of the optic. ### Claim 14 (depends on 13) The ophthalmic visualization system of claim 13, wherein: the treatment light source is configured to generate an ultraviolet treatment light for adjusting an optical property of the implanted IOL. ### Claim 15 A method of tracking an intraocular lens, the method comprising: rear-illuminating an eye that has an implanted intraocular lens (IOL), with an ophthalmic visualization system by generating a rear illumination light with a rear illumination system and projecting the rear illumination light with an optic onto a retina of the eye, so that a portion of the rear illumination light reflects from the retina as a reflected illumination light, wherein a central portion of the reflected illumination light propagates through the IOL to form an IOL-focused illumination light, and a peripheral portion of the reflected illumination light propagates around the IOL to form a peripheral illumination light; receiving and transmitting the IOL-focused illumination light and the peripheral illumination light by the optic; stopping the transmitted peripheral illumination light by an aperture stop; allowing the transmitted IOL-focused illumination light to pass through by the aperture stop; and forming an isolated IOL image based on the transmitted IOL-focused illumination light by an imaging system. ### Claim 16 (depends on 15) The method of claim 15, comprising: determining a location of the IOL from the isolated IOL image with an image processor of the imaging system, in an optic reference frame.