US 11,992,266 B2
System and method for measuring tilt in the crystalline lens for laser phaco fragmentation
Gary P. Gray, Orlando, FL (US); Rudolph W. Frey, Winter Park, FL (US); and Steven E. Bott, Oviedo, FL (US)
Assigned to Lensar, Inc., Orlando, FL (US)
Filed by Lensar, Inc., Orlando, FL (US)
Filed on Nov. 29, 2021, as Appl. No. 17/537,219.
Application 17/537,219 is a continuation of application No. 13/427,319, filed on Mar. 22, 2012, granted, now 11,185,226.
Claims priority of provisional application 61/467,601, filed on Mar. 25, 2011.
Prior Publication US 2022/0330818 A1, Oct. 20, 2022
Int. Cl. A61B 3/14 (2006.01); A61B 3/10 (2006.01); A61F 9/008 (2006.01); H04N 19/523 (2014.01)
CPC A61B 3/145 (2013.01) [A61B 3/10 (2013.01); A61F 9/008 (2013.01); H04N 19/523 (2014.11); A61F 2009/0087 (2013.01); A61F 2009/00872 (2013.01); A61F 2009/00878 (2013.01); A61F 2009/00889 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A system for generating three dimensional shapes for a cornea and a lens of the eye, the system comprising:
a. an illumination source configured to illuminate the eye with multiple sections of light;
b. a camera configured to obtain multiple sectional images of the eye based on an illumination from the multiple sections of light;
c. a computer image processor in communication with the camera;
d. the computer image processor configured to perform the following processes on an obtained sectional image:
(i) identifying arcs, in two-dimensional space, corresponding to anterior and posterior corneal and lens surfaces of the eye by image analysis and curve fitting of the obtained sectional image;
(ii) determining an intersection of lines ray traced back from the identified arcs in two-dimensional space with a known position of a section of space containing the section of light that generated the obtained sectional image, wherein the determined intersection defines a three-dimensional arc curve; and
(iii) reconstructing three-dimensional shapes of the anterior and posterior cornea surfaces and the anterior and posterior lens surfaces based on fitting the three-dimensional arc curve to a three-dimensional shape.