Determining the current position of a patient's eye based on a Purkinje image.

The method and device use a Purkinje image to ensure precise eye positioning for laser treatment, addressing the need for efficient and minimally invasive corneal procedures by enabling automatic eye tracking and correction.

DE102019133433C5Active Publication Date: 2026-05-28SCHWIND EYE TECH SOLUTIONS GMBH
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Patent Information

Application Number
DE102019133433
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2019-12-06
Publication Date
2026-05-28
Estimated Expiration
2039-12-06

AI Technical Summary

Technical Problem

Existing laser procedures for treating corneal opacity and scarring are invasive and require precise, efficient positioning of treatment devices to minimize disruption to unaffected areas of the cornea.

Method used

A method and device that utilize a Purkinje image to accurately determine the position of a patient's eye relative to the optical axis of a laser beam, enabling automatic eye tracking and position correction, ensuring precise treatment without manual intervention.

Benefits of technology

Enables reliable and efficient laser treatment by accurately determining and correcting the eye's position, reducing treatment time and minimizing invasiveness.

✦ Generated by Eureka AI based on patent content.

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Abstract

Method for determining a current position of an eye (3) of a patient relative to an optical axis (4) of a laser beam (24) in a neutral position of a beam deflection device (22) of a treatment device (10) comprising the steps: - Specifying a criterion characterizing the eye (3) depending on patient information; - Determining a first target position of the eye (3) relative to the optical axis (4); - Positioning a patient interface (2) of the treatment device (10) in a predetermined area in front of the optical axis (4) and in front of the eye (3), wherein the patient interface (2) is designed to dock onto the eye (3); - Illuminating the eye (3) by means of a lighting device (7) of the treatment device (10) during an approach procedure (18a) of the patient interface (2) to the eye (3); - Acquisition of a Purkinje image (12a) associated with a cornea of ​​the eye (3) using the optical detection device (9) during the approach process (18a); - Comparing the captured Purkinje image (12a) with the optical axis (4) and determining the current position of the eye (3) based on this; and - Comparing the current position with the target position and, in case of a deviation of the current position from the target position, outputting a control signal to a control unit (20) of the treatment device (10); wherein the eye (3) is illuminated by means of a lighting device (7) arranged at the patient interface (2) and the Purkinje image (12a) is captured by means of a detection device (9) arranged at the patient interface (2).
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Citation Information

Patent Citations

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