US 12,239,386 B2
Method for determining a position of a laser focus of a laser beam of an eye surgical laser, as well as treatment apparatus
Pascal Naubereit, Aschaffenburg (DE)
Assigned to SCHWIND EYE-TECH-SOLUTIONS GMBH, Kleinostheim (DE)
Filed by SCHWIND eye-tech-solutions GmbH, Kleinostheim (DE)
Filed on May 26, 2021, as Appl. No. 17/331,061.
Claims priority of application No. 10 2020 114 212.9 (DE), filed on May 27, 2020.
Prior Publication US 2021/0369356 A1, Dec. 2, 2021
Int. Cl. A61B 34/20 (2016.01); A61F 9/008 (2006.01)
CPC A61B 34/20 (2016.02) [A61F 9/008 (2013.01); A61B 2034/2057 (2016.02); A61B 2034/2065 (2016.02)] 10 Claims
OG exemplary drawing
 
1. A method for determining a position of a laser focus of a laser beam of an eye surgical laser of a treatment apparatus by a control device of the treatment apparatus, comprising:
emitting into or onto a human or animal eye the laser beam of the treatment apparatus;
capturing by an optical capturing device of the treatment apparatus at least two Purkinje images of the laser beam on the eye; and
determining by the control device, in regular time intervals during a treatment, the position of the laser focus of the laser beam in or on the human or animal eye based on a respective size of the at least two Purkinje images, a relative position of the at least two Purkinje images to each other, and an opening angle of the laser beam.