-
公开(公告)号：US20210093192A1
公开(公告)日：2021-04-01
申请号：US17025335
申请日：2020-09-18
Applicant: Alcon Inc.
Inventor： Martin Gründig
Abstract: Systems and methods for initializing and calibrating an eye tracking system include an eye tracker configured to capture a first image of an eye from a first location and a second image of the eye from a second location, and a control processor configured to detect a first plurality of eye characteristics from the first image, the eye characteristics having first corresponding image coordinates, detect a second plurality of eye characteristics from the second image, the eye characteristics having second corresponding image coordinates, and determine a calibration offset and a calibration gain. The control processor may be further configured to determine an eye fixation position and orientation relative to an optical axis of the eye tracker based at least in part on the first corresponding image coordinates and/or the second corresponding image coordinates.
-
公开(公告)号：US12070270B2
公开(公告)日：2024-08-27
申请号：US17507659
申请日：2021-10-21
Applicant: Alcon Inc.
Inventor： John Alfred Campin , Martin Gründig , Armin Haupt , George Hunter Pettit , Mark Andrew Zielke
CPC classification number: A61B3/113 , A61B3/0025
Abstract: A method for assessing a lens capsule stability condition in an eye of a human patient includes directing electromagnetic energy in a predetermined spectrum onto a pupil of the eye, via an energy source, concurrently subsequent to a movement of the eye causing eye saccades to occur therein. The method also includes acquiring images of the eye indicative of the eye saccades using an image capture device, and computing, via the ECU, a motion curve of the lens capsule using the images. Additionally, the method includes extracting time-normalized lens capsule oscillation traces based on the motion curve via the ECU, and then model-fitting the lens capsule oscillation traces via the ECU to thereby assess the lens capsule instability condition. An automated system for performing an embodiment of the method is also disclosed herein, including the energy source, image capture device, and ECU.
-
公开(公告)号：US20230329548A1
公开(公告)日：2023-10-19
申请号：US18336747
申请日：2023-06-16
Applicant: Alcon Inc.
Inventor： Sascha Birkner , Martin Gründig
IPC: A61B3/113 , G06T7/246 , G06T7/00 , A61B3/14 , A61B3/18 , A61B3/00 , A61B3/12 , G06V40/19 , G06T7/73 , A61B3/10
CPC classification number: A61B3/113 , G06T7/248 , G06T7/0016 , A61B3/14 , A61B3/18 , A61B3/0025 , A61B3/1225 , G06V40/19 , G06T7/74 , A61B3/102 , G06T2207/10101 , G06T2207/30041
Abstract: Systems and methods for tracking eye movement during a diagnostic procedure include an eye tracker capturing images of an eye, and a control processor configured to detect an eye position and orientation in each of the images, determine an eye fixation position and orientation relative to an optical axis of the eye tracker, estimate eye fixation parameters based at least in part on the determined eye fixation position and orientation, and track the eye position and orientation by analyzing the images to determine the eye position and orientation relative to the eye fixation parameters. The eye fixation parameters may comprise a reference position and orientation of the eye when fixated. A histogram is constructed of detected eye positions and orientations and analyzed to determine an eye fixation position and orientation.
-
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.
-
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.
-
Patent Agency Ranking
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.
-
公开(公告)号：US12295660B2
公开(公告)日：2025-05-13
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.
-
公开(公告)号：US20250113993A1
公开(公告)日：2025-04-10
申请号：US18987705
申请日：2024-12-19
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.
-
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.
-
公开(公告)号：US11717156B2
公开(公告)日：2023-08-08
申请号：US16991937
申请日：2020-08-12
Applicant: Alcon Inc.
Inventor： Sascha Birkner , Martin Gründig
IPC: A61B3/113 , G06T7/73 , G06T7/246 , A61B3/00 , A61B3/10 , A61B3/12 , A61B3/14 , A61B3/18 , G06T7/00 , G06V40/19
CPC classification number: A61B3/113 , A61B3/0025 , A61B3/102 , A61B3/1225 , A61B3/14 , A61B3/18 , G06T7/0016 , G06T7/248 , G06T7/74 , G06V40/19 , G06T2207/10101 , G06T2207/30041
Abstract: Systems and methods for tracking eye movement during a diagnostic procedure include an eye tracker capturing images of an eye, and a control processor configured to detect an eye position and orientation in each of the images, determine an eye fixation position and orientation relative to an optical axis of the eye tracker, estimate eye fixation parameters based at least in part on the determined eye fixation position and orientation, and track the eye position and orientation by analyzing the images to determine the eye position and orientation relative to the eye fixation parameters. The eye fixation parameters may comprise a reference position and orientation of the eye when fixated. A histogram is constructed of detected eye positions and orientations and analyzed to determine an eye fixation position and orientation.
-
-
-
-
-
-
-
-
-
Search Results
31
records
(took 0.016 seconds)
