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公开(公告)号：US12186018B2
公开(公告)日：2025-01-07
申请号：US17025452
申请日：2020-09-18
Applicant: Alcon Inc.
Inventor： Sascha Birkner , Martin Gründig , Peter Zieger
IPC: A61B3/10 , A61B3/02 , A61B3/113 , A61B3/12 , A61B3/14 , G06T7/00 , G06T7/20 , G06T7/73 , G06V40/19
Abstract: Systems and methods for tracking the position and condition of an eye during an ophthalmic procedure include an ophthalmic device configured to measure characteristics of an eye, an eye tracker configured to capture a stream of eye images, and a logic device configured to analyze the stream of images to determine whether the eye is fixating on a target object, detect a predetermined blink sequence in the first stream of images, delay for a predetermined tear stabilization period, start a stable tear film interval, and during the stable tear film interval, capture at least one measurement of the eye using the ophthalmic device when the eye is fixating. The blink sequence may include a plurality of blinks in succession and the detection of the blink sequence may include processing the images through a neural network trained to detect an open eye and/or a closed eye.
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公开(公告)号：US12076085B2
公开(公告)日：2024-09-03
申请号：US17113611
申请日：2020-12-07
Applicant: Alcon Inc.
Inventor： John Alfred Campin , Martin Gruendig , Christopher Sean Mudd , George Hunter Pettit , Peter Zieger
CPC classification number: A61B3/101 , A61B3/1005 , A61B3/14
Abstract: A method of verifying ophthalmic measurements includes obtaining, via an ophthalmic measurement device, a first measurement of at least one ophthalmic parameter over a first measurement area. The first measurement area corresponds to an unassisted visible area of a patient's eye. A second measurement of the at least one ophthalmic parameter over a second measurement area is obtained via the measurement device. The second measurement area corresponds to an assisted visible area of the patient's eye. The first measurement is compared to the second measurement. It is determined if the second measurement diverges from the first measurement. Responsive to a determination that the second measurement diverges from the first measurement, an alert that the second measurement is inaccurate is generated. Responsive to a determination that the second measurement does not diverge from the first measurement, the second measurement is accepted as accurate.
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公开(公告)号：US20220225869A1
公开(公告)日：2022-07-21
申请号：US17574667
申请日：2022-01-13
Applicant: Alcon Inc.
Inventor： George Hunter Pettit , Daniil Nekrassov , Peter Zieger , Martin Gründig , Horia Grecu , Mark Andrew Zielke , John Alfred Campin
Abstract: An ophthalmic system for generating an ocular model of an eye includes an optical coherence tomography (OCT) device, an aberrometer, and a computer. The OCT device detects OCT light reflected from the eye. The aberrometer detects aberrometer light reflected from the eye. The computer generates the ocular model of the eye according to the reflected OCT light. The ocular model includes parameters describing the eye. The parameters include lens parameters that describe the lens of the eye. The computer determines an OCT-based wavefront according to the ocular model, determines an aberrometer-based wavefront according to the reflected aberrometer light, and compares the OCT-based and the aberrometer-based wavefronts. If the wavefronts differ beyond a predefined tolerance, the computer adjusts one or more values assigned to the parameters until the wavefronts satisfy the predefined tolerance. At least one adjusted value is assigned to a lens parameter.
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公开(公告)号：US20250082198A1
公开(公告)日：2025-03-13
申请号：US18958720
申请日：2024-11-25
Applicant: Alcon Inc.
Inventor： Sascha Birkner , Martin Gründig , Peter Zieger
Abstract: Systems and methods for tracking the position and condition of an eye during an ophthalmic procedure include an ophthalmic device configured to measure characteristics of an eye, an eye tracker configured to capture a stream of eye images, and a logic device configured to analyze the stream of images to determine whether the eye is fixating on a target object, detect a predetermined blink sequence in the first stream of images, delay for a predetermined tear stabilization period, start a stable tear film interval, and during the stable tear film interval, capture at least one measurement of the eye using the ophthalmic device when the eye is fixating. The blink sequence may include a plurality of blinks in succession and the detection of the blink sequence may include processing the images through a neural network trained to detect an open eye and/or a closed eye.
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公开(公告)号：US20210173229A1
公开(公告)日：2021-06-10
申请号：US17113611
申请日：2020-12-07
Applicant: Alcon Inc.
Inventor： John Alfred Campin , Martin Gruendig , Christopher Sean Mudd , George Hunter Pettit , Peter Zieger
Abstract: A method of verifying ophthalmic measurements includes obtaining, via an ophthalmic measurement device, a first measurement of at least one ophthalmic parameter over a first measurement area. The first measurement area corresponds to an unassisted visible area of a patient's eye. A second measurement of the at least one ophthalmic parameter over a second measurement area is obtained via the measurement device. The second measurement area corresponds to an assisted visible area of the patient's eye. The first measurement is compared to the second measurement. It is determined if the second measurement diverges from the first measurement. Responsive to a determination that the second measurement diverges from the first measurement, an alert that the second measurement is inaccurate is generated. Responsive to a determination that the second measurement does not diverge from the first measurement, the second measurement is accepted as accurate.
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Patent Agency Ranking
公开(公告)号：US20220248951A1
公开(公告)日：2022-08-11
申请号：US17649560
申请日：2022-02-01
Applicant: Alcon Inc.
Inventor： Peter Zieger , Martin Gründig , Daniil Nekrassov , Horia Grecu
Abstract: An ophthalmic system for generating a topography of an anterior corneal surface of an eye comprises an illuminator, cameras, and a computer. The illuminator illuminates the anterior corneal surface of the eye with a Placido pattern, which reflects the Placido pattern. Each camera generates an image of the reflected Placido pattern to yield multiple images. At least one camera is oriented off an axis of the eye. For each image, the computer calculates a curvature value for each data point of the image, where a data point corresponds to a surface point of the anterior corneal surface. The calculations yield curvature values for each surface point. The computer determines the curvature at each surface point from one or more curvature values for the surface point. The computer generates the topography of the anterior corneal surface from the curvatures at the surface points of the anterior corneal surface.
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公开(公告)号：US20220183550A1
公开(公告)日：2022-06-16
申请号：US17501929
申请日：2021-10-14
Applicant: Alcon Inc.
Inventor： John Alfred Campin , Martin Gründig , Daniil Nekrassov , George Hunter Pettit , Peter Zieger
IPC: A61B3/10
Abstract: In certain embodiments, an ophthalmic system for assessing a tear film of an eye comprises measuring devices and a computer. The measuring devices detect light reflected from the eye, where an ocular surface of the eye comprises the tear film, and generate data from the reflected light that describes the eye. The computer aligns the data corresponding to the same location for a plurality of locations, assesses the data at the locations to detect one or more abnormalities of the tear film, and determines a tear film description from the assessment of the data at the locations.
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公开(公告)号：US20220125304A1
公开(公告)日：2022-04-28
申请号：US17505701
申请日：2021-10-20
Applicant: Alcon Inc.
Inventor： Peter Zieger , Horia Grecu
Abstract: In certain embodiments, an ophthalmic system for determining the topography of the anterior surface of the cornea of an eye comprises an illuminator, a camera, and a computer. The illuminator illuminates the anterior surface of the cornea of the eye with a Placido pattern. The Placido pattern comprises a plurality of rings. A ring of the plurality of rings has a distinguishing feature that distinguishes the ring from an adjacent ring. The anterior surface of the cornea reflects the Placido pattern. The camera captures an image of the reflected Placido pattern. The computer: analyzes the image to detect a distortion of the ring that indicates an anomaly of the anterior surface of the cornea; identifies the ring of the plurality of rings according to the distinguishing feature of the ring; and generates the topography of the surface of the cornea that includes the anomaly.
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公开(公告)号：US20210093193A1
公开(公告)日：2021-04-01
申请号：US17025452
申请日：2020-09-18
Applicant: Alcon Inc.
Inventor： Sascha Birkner , Martin Gründig , Peter Zieger
Abstract: Systems and methods for tracking the position and condition of an eye during an ophthalmic procedure include an ophthalmic device configured to measure characteristics of an eye, an eye tracker configured to capture a stream of eye images, and a logic device configured to analyze the stream of images to determine whether the eye is fixating on a target object, detect a predetermined blink sequence in the first stream of images, delay for a predetermined tear stabilization period, start a stable tear film interval, and during the stable tear film interval, capture at least one measurement of the eye using the ophthalmic device when the eye is fixating. The blink sequence may include a plurality of blinks in succession and the detection of the blink sequence may include processing the images through a neural network trained to detect an open eye and/or a closed eye.
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公开(公告)号：US12207871B2
公开(公告)日：2025-01-28
申请号：US17574667
申请日：2022-01-13
Applicant: Alcon Inc.
Inventor： George Hunter Pettit , Daniil Nekrassov , Peter Zieger , Martin Gründig , Horia Grecu , Mark Andrew Zielke , John Alfred Campin
Abstract: An ophthalmic system for generating an ocular model of an eye includes an optical coherence tomography (OCT) device, an aberrometer, and a computer. The OCT device detects OCT light reflected from the eye. The aberrometer detects aberrometer light reflected from the eye. The computer generates the ocular model of the eye according to the reflected OCT light. The ocular model includes parameters describing the eye. The parameters include lens parameters that describe the lens of the eye. The computer determines an OCT-based wavefront according to the ocular model, determines an aberrometer-based wavefront according to the reflected aberrometer light, and compares the OCT-based and the aberrometer-based wavefronts. If the wavefronts differ beyond a predefined tolerance, the computer adjusts one or more values assigned to the parameters until the wavefronts satisfy the predefined tolerance. At least one adjusted value is assigned to a lens parameter.
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