Patent ID: 8579441
Filing Date: 2013-11-12
Classification: A61B

Abstract:
1. A method for measuring a flicker perception threshold using a device comprising an operation unit, a display screen, and a recording unit, the method comprising: a first step of alternately displaying on the display screen an ON-period image and an OFF-period image each having a plurality of regions, the ON-period image and the OFF-period image having a contrast difference only in one corresponding region selected from the plurality of regions; a second step of, when it is judged during display of the ON and OFF-period images that an operation in the operation unit that is made by a test subject in response to perception of a flicker does not properly specify the one corresponding region, increasing the contrast difference, and when it is judged that the operation in the operation unit properly specifies the one corresponding region, recording the contrast difference at the time in the recording unit as a measured contrast difference; and a third step of judging whether the measured contrast difference recorded in the recording unit is converged; when it is judged that the measured contrast difference is not converged, decreasing the contrast difference, and when it is judged that the measured contrast difference is converged, determining a convergence value of the measured contrast difference as information corresponding to the flicker perception threshold.