公开(公告)号：AU2019273058A1

公开(公告)日：2020-10-08

申请号：AU2019273058

申请日：2019-05-08

Applicant: ALCON INC

Inventor： NEKRASSOV DANIIL ,  GRUENDIG MARTIN

IPC: A61B3/10 ,  A61B3/107

Abstract: In certain embodiments, a system for measuring the posterior corneal surface of the cornea comprises cameras and a computer. Each camera generates image data representing a part of the eye posterior to the cornea. The image data describes locations of features of the part. The computer stores a description of the shape of an anterior corneal surface of the cornea, and applies a ray-tracing process to determine the shape of the posterior corneal surface. The ray-tracing process comprises defining rays, where each ray is traced from a camera, through the anterior and posterior corneal surfaces, and to the part of the eye. Constraints for the rays are determined, where the constraints are calculated using the description of the shape of the anterior corneal surface and locations of the features in the image data. Parameters are optimized, and the optimized parameters describe the shape of the posterior corneal surface.

公开(公告)号：AU2021396599A1

公开(公告)日：2023-06-08

申请号：AU2021396599

申请日：2021-10-14

Applicant: ALCON INC

Inventor： PETTIT GEORGE HUNTER ,  ZIELKE MARK ANDREW ,  CAMPIN JOHN ALFRED ,  GRÜNDIG MARTIN ,  NEKRASSOV DANIIL

IPC: A61B3/00

Abstract: A system and method for selecting a preferred intraocular lens, for implantation into an eye, includes a controller having a processor and a tangible, non-transitory memory on which instructions are recorded. The controller is in communication with a diagnostic module adapted to store pre-operative anatomic data of the eye as an eye model. The controller is configured to determine respective imputed post-operative variables for each of a plurality of intraocular lenses, via a projection module. A respective pseudophakic eye model is generated for each of the plurality of intraocular lenses by incorporating the respective imputed post-operative variables into the eye model. A ray tracing module is executed in the respective pseudophakic eye model to determine at least one respective metric for the plurality of intraocular lenses. The preferred intraocular lens is selected based on a comparison of the respective metric.

公开(公告)号：CA3197517A1

公开(公告)日：2022-06-16

申请号：CA3197517

申请日：2021-10-14

Applicant: ALCON INC

Inventor： PETTIT GEORGE HUNTER ,  ZIELKE MARK ANDREW ,  CAMPIN JOHN ALFRED ,  GRUNDIG MARTIN ,  NEKRASSOV DANIIL

IPC: A61B3/00

Abstract: A system and method for selecting a preferred intraocular lens, for implantation into an eye, includes a controller having a processor and a tangible, non-transitory memory on which instructions are recorded. The controller is in communication with a diagnostic module adapted to store pre-operative anatomic data of the eye as an eye model. The controller is configured to determine respective imputed post-operative variables for each of a plurality of intraocular lenses, via a projection module. A respective pseudophakic eye model is generated for each of the plurality of intraocular lenses by incorporating the respective imputed post-operative variables into the eye model. A ray tracing module is executed in the respective pseudophakic eye model to determine at least one respective metric for the plurality of intraocular lenses. The preferred intraocular lens is selected based on a comparison of the respective metric.

公开(公告)号：AU2021396599A9

公开(公告)日：2024-10-03

申请号：AU2021396599

申请日：2021-10-14

Applicant: ALCON INC

Inventor： PETTIT GEORGE HUNTER ,  ZIELKE MARK ANDREW ,  CAMPIN JOHN ALFRED ,  GRÜNDIG MARTIN ,  NEKRASSOV DANIIL

IPC: A61B3/00

Abstract: A system and method for selecting a preferred intraocular lens, for implantation into an eye, includes a controller having a processor and a tangible, non-transitory memory on which instructions are recorded. The controller is in communication with a diagnostic module adapted to store pre-operative anatomic data of the eye as an eye model. The controller is configured to determine respective imputed post-operative variables for each of a plurality of intraocular lenses, via a projection module. A respective pseudophakic eye model is generated for each of the plurality of intraocular lenses by incorporating the respective imputed post-operative variables into the eye model. A ray tracing module is executed in the respective pseudophakic eye model to determine at least one respective metric for the plurality of intraocular lenses. The preferred intraocular lens is selected based on a comparison of the respective metric.

公开(公告)号：CA3094239A1

公开(公告)日：2019-11-28

申请号：CA3094239

申请日：2019-05-08

Applicant: ALCON INC

Inventor： NEKRASSOV DANIIL ,  GRUENDIG MARTIN

IPC: A61B3/10 ,  A61B3/107

Abstract: In certain embodiments, a system for measuring the posterior corneal surface of the cornea comprises cameras and a computer. Each camera generates image data representing a part of the eye posterior to the cornea. The image data describes locations of features of the part. The computer stores a description of the shape of an anterior corneal surface of the cornea, and applies a ray-tracing process to determine the shape of the posterior corneal surface. The ray-tracing process comprises defining rays, where each ray is traced from a camera, through the anterior and posterior corneal surfaces, and to the part of the eye. Constraints for the rays are determined, where the constraints are calculated using the description of the shape of the anterior corneal surface and locations of the features in the image data. Parameters are optimized, and the optimized parameters describe the shape of the posterior corneal surface.