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Poster session 3
Time: 27/Aug/2019: 11:00am-12:30pm · Location: Jubileumzaal
Evaluation of color-vision deficiency test based on pupil oscillations
1Toyohashi university of technology, Japan; 2Electronics-Inspired Interdisciplinary Research Institute, Toyohashi University of Technology, Japan
The Pupil Frequency Tagging (PFT), pupil oscillations by modulating stimulus luminance level of objects, have been used in the tracking of an attentional shift. We advanced the PFT for an evaluation of color-vision deficiency in order to use color changes in equiluminant displays instead of luminance changes. Here, we used the flickering stimuli imitated from Ishihara pseudo-isochromatic plates, each of which contains three luminance levels of green or red colored dots on the color confusion lines; the stimulus out of five types of color contrast within green/red was selected from the subject’s subjective color discrimination threshold plus two fixed contrast levels (i.e. seven different distances on the color confusion lines). The stimulus was flicked at 1 Hz from green to red pattern and vice versa while monitoring participant's pupil changes with an eye-tracker. The color-vision deficiency threshold was predicted by the similarity between the pupil oscillations to the fixed contrast level and each variable contrast. The predicted threshold was significantly related to subjective color discrimination. This novel classification method based on the photoreceptors dependence pupillary oscillations characterized subject’s color-vision deficiency as well as the extent, without any subjective tests.
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