US 12,446,772 B2
Methods and system to identify position, rotation, and tilt of a contact lens on an eye
Xifeng Xiao, Albuquerque, NM (US); Daniel R. Neal, Tijeras, NM (US); Jeff Kolberg, Laguna Beach, CA (US); Ron Rammage, Tijeras, NM (US); Phillip Riera, Albuquerque, NM (US); R. James Copland, Albuquerque, NM (US); and Matthew Haugo, Aliso Viejo, CA (US)
Assigned to WaveFront Dynamics, Inc., Albuquerque, NM (US)
Filed by Wavefront Dynamics, Inc., Albuquerque, NM (US)
Filed on Oct. 27, 2022, as Appl. No. 17/975,007.
Claims priority of provisional application 63/402,351, filed on Aug. 30, 2022.
Claims priority of provisional application 63/274,664, filed on Nov. 2, 2021.
Prior Publication US 2023/0133703 A1, May 4, 2023
Int. Cl. A61B 3/10 (2006.01); A61B 3/14 (2006.01); A61B 90/00 (2016.01); A61B 90/30 (2016.01)
CPC A61B 3/1015 (2013.01) [A61B 3/14 (2013.01); A61B 2090/306 (2016.02); A61B 2090/3937 (2016.02)] 2 Claims
OG exemplary drawing
 
1. A method of identifying and correcting for any misaligned position and/or misaligned rotation of a contact lens disposed on an eye, comprising:
(a) determining a prescription of a trial contact lens on an eye by making dynamic measurements of an eye's visual aberrations with a combined optical aberrometer/topographer optical instrument;
(b) determining an optimal pupil size;
(c) determining the pupil's center and radius;
(d) determining an Iris' center and radius;
(e) determining the contact lens center and radius using predefined fiducial marks on the contact lens;
(f) performing modal and/or zonal wavefront sensor analysis and calculating Xernike polynomial coefficients that define a family of wavefront aberrations;
(g) filtering out outliers (blinks);
(h) generating a 2-D wavefront contour map showing a distribution of wavefront aberrations across the eye;
(i) converting the 2-D wavefront contour map into a 3D wavefront guided contact lens thickness correction profile; and
(j) using the WFG corrected thickness profile to fabricate a wavefront-corrected contact lens by taking into consideration any XY mis-alignment and/or mis-rotation of the contact lens.