US 12,256,993 B2
Method and device for determining a visual performance
Siegfried Wahl, Donzdorf (DE); Peter Essig, Tübingen (DE); Yannick Sauer, Tübingen (DE); and Alexander Leube, Aalen (DE)
Assigned to Carl Zeiss Vision International GmbH, Aalen (DE)
Filed by Carl Zeiss Vision International GmbH, Aalen (DE)
Filed on Aug. 15, 2023, as Appl. No. 18/450,001.
Application 18/450,001 is a continuation of application No. PCT/EP2022/056308, filed on Mar. 11, 2022.
Claims priority of application No. 21162274 (EP), filed on Mar. 12, 2021.
Prior Publication US 2023/0404395 A1, Dec. 21, 2023
Int. Cl. A61B 3/113 (2006.01); A61B 3/02 (2006.01); A61B 3/10 (2006.01); A61B 3/12 (2006.01)
CPC A61B 3/113 (2013.01) 13 Claims
OG exemplary drawing
 
1. A computer-implemented method for determining a visual performance of at least one eye of a person, the method comprising the following steps:
a) displaying to the at least one eye of the person at least one visual stimulus configured to elicit at least one type of eye movements in the at least one eye of the person by using at least one screen;
b) tracking the at least one type of eye movements in the at least one eye of the person by using at least one eye tracker;
c) determining the visual performance of the at least one eye of the person by using at least one first piece of information about the at least one visual stimulus and at least one second piece of information about an occurrence of the at least one type of eye movements in the at least one eye of the person by using at least one processing unit,
wherein at least a part of the at least one visual stimulus is displayed in a time-varying manner,
wherein the at least one visual stimulus is presented in a manner that the at least one part of at the least one visual stimulus varies an appearance of the at least one visual stimulus to the at least one eye of the person over time, independent of whether the at least one type of eye movements is elicited in the at least one eye of the person or not,
wherein the time-varying manner comprises continuously modifying the at least one part of the at least one visual stimulus by increasing or decreasing at least one value for the at least one parameter for the at least one part of the at least one visual stimulus between a lower value and an upper value in a monotonous manner, or between the upper value and the lower value in a monotonous manner,
wherein the upper value is selected to elicit the at least one type of eye movements in the at least one eye of the person,
wherein the lower value is selected not to elicit the at least one type of eye movements in the at least one eye of the person, and
wherein continuously modifying the at least one part of the at least one visual stimulus is performed as a variation in which a sign of a first derivative of the variation does not change during the course of the variation.