US 12,076,085 B2
Method and system for measuring optical parameters
John Alfred Campin, Southlake, TX (US); Martin Gruendig, Rangsdorf (DE); Christopher Sean Mudd, Lake Forest, CA (US); George Hunter Pettit, Fort Worth, TX (US); and Peter Zieger, Berlin (DE)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Dec. 7, 2020, as Appl. No. 17/113,611.
Claims priority of provisional application 63/006,820, filed on Apr. 8, 2020.
Claims priority of provisional application 62/945,909, filed on Dec. 10, 2019.
Prior Publication US 2021/0173229 A1, Jun. 10, 2021
Int. Cl. A61B 3/10 (2006.01); A61B 3/14 (2006.01)
CPC A61B 3/101 (2013.01) [A61B 3/1005 (2013.01); A61B 3/14 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of verifying ophthalmic measurements, the method comprising:
obtaining, via an ophthalmic measurement device, a first measurement of at least one ophthalmic parameter, over a first measurement area, the first measurement area corresponding to an unassisted measurable area of a patient's eye, the first measurement area covering less than an entire cornea of the patient's eye;
obtaining, via the ophthalmic measurement device, a second measurement of the at least one ophthalmic parameter over a second measurement area, the second measurement area corresponding to an assisted measurable area of the patient's eye, wherein the second measurement area includes a sub-region that coincides with the first measurement area, the second measurement area covering the entire cornea;
obtaining from the ophthalmic measuring device, first reflections associated with the first measurement and second reflections associated with the second measurement;
sampling a portion of the second measurement corresponding to the sub-region;
comparing the sampled portion of the second measurement to the first measurement comprising scaling the first measurement area to the second measurement area;
determining if the second measurement diverges from the first measurement, the divergence of the second measurement from the first measurement including a difference in the at least one ophthalmic parameter between the first measurement and the second measurement of the at least one ophthalmic parameter;
responsive to a determination that the second measurement diverges from the first measurement, generating an alert that the second measurement is inaccurate;
comparing the first reflections to the second reflections;
determining if there are discrepancies between the first reflections and the second reflections; and
responsive to a determination that discrepancies are present between the second reflections and the first reflections, generating an alert that the patient's tear film has dried.