US 11,712,161 B2
Eye tracking fixation monitoring systems and methods
Sascha Birkner, Berlin (DE); and Martin Gründig, Rangsdorf (DE)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Aug. 12, 2020, as Appl. No. 16/991,913.
Claims priority of provisional application 62/886,510, filed on Aug. 14, 2019.
Prior Publication US 2021/0045630 A1, Feb. 18, 2021
Int. Cl. A61B 3/113 (2006.01); G06T 7/73 (2017.01); A61B 3/00 (2006.01); A61B 3/10 (2006.01); A61B 3/12 (2006.01); A61B 3/14 (2006.01); A61B 3/18 (2006.01); G06V 40/19 (2022.01)
CPC A61B 3/113 (2013.01) [A61B 3/0025 (2013.01); A61B 3/102 (2013.01); A61B 3/1225 (2013.01); A61B 3/14 (2013.01); A61B 3/18 (2013.01); G06T 7/74 (2017.01); G06V 40/19 (2022.01); G06T 2207/10101 (2013.01); G06T 2207/30041 (2013.01); G06V 2201/03 (2022.01)] 16 Claims
OG exemplary drawing
 
1. A system comprising:
a retina imaging system configured to capture a first plurality of images of an eye;
an eye tracker configured to capture a second plurality of images of the eye and track an eye position and orientation;
a control processor configured to:
detect whether a fovea is present in one or more of the first plurality of images;
identify a first image from the first plurality of images having the detected fovea;
determine a second image from the second plurality of images having a temporal proximity to the first image; and
analyze the second image to determine eye fixation parameters, wherein the eye fixation parameters comprise a reference position and orientation of the eye when fixated; and
wherein the control processor is further configured to analyze the second plurality of images to determine a current eye position and orientation relative to the reference position and orientation of the eye when fixated.