US 11,850,187 B2
Method for determining a current position of an eye of a patient based on a purkinje image
Samuel Arba Mosquera, Aschaffenburg (DE); Thomas Klinner, Glattbach (DE); Mario Shraiki, Stockstadt (DE); and Nico Triefenbach, Mainaschaff (DE)
Assigned to SCHWIND EYE-TECH-SOLUTIONS GMBH, Kleinostheim (DE)
Filed by Schwind eye-tech-solutions GmbH, Kleinostheim (DE)
Filed on Dec. 4, 2020, as Appl. No. 17/112,326.
Claims priority of application No. 10 2019 133 433.0 (DE), filed on Dec. 6, 2019.
Prior Publication US 2021/0169692 A1, Jun. 10, 2021
Int. Cl. A61F 9/008 (2006.01); A61F 9/009 (2006.01)
CPC A61F 9/0084 (2013.01) [A61F 9/009 (2013.01); A61F 2009/00846 (2013.01); A61F 2009/00872 (2013.01); A61F 2009/00897 (2013.01)] 43 Claims
OG exemplary drawing
 
1. A method for determining a current position of an eye of a patient relative to an optical axis of a laser beam formed in a neutral pose of a beam deflection device of a treatment apparatus, comprising the steps of:
presetting a criterion characterizing the eye depending on patient information of the patient;
determining a first target position of the eye relative to the optical axis;
positioning a patient interface of the treatment apparatus in a preset area in front of the optical axis, wherein the patient interface is configured for docking to the eye;
illuminating the eye with an illumination device of the treatment apparatus during an approaching procedure of the patient interface to the eye;
capturing a Purkinje image, which is associated with a cornea of the eye, with an optical capturing device of the treatment apparatus during the approaching procedure;
comparing the Purkinje image to the optical axis and determining the current position of the eye based thereon;
comparing the current position of the eye to the first target position of the eye, and with a deviation of the current position from the first target position, outputting a control signal to a control device of the treatment apparatus; and
performing a docking procedure for docking the patient interface to the eye.