Title:
目の後部角膜表面の測定
Document Type and Number:
Japanese Patent JP7328253
Kind Code:
B2
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.
Inventors:
Danil Nekrasov
Martin Grundig
Martin Grundig
Application Number:
JP2020558897A
Publication Date:
August 16, 2023
Filing Date:
May 08, 2019
Export Citation:
Assignee:
Archon Incorporated
International Classes:
A61B3/107
Foreign References:
| US20010033362 | ||||
| US20180125355 |
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mihashi
Kentaro Ito
Keiji Akagi
Shinji Mihashi
Kentaro Ito
Keiji Akagi