Centre National De La Recherche Scientifique

Institut National De La Sante Et De La Recherche Medicale

Sorbonne Université

Assistance Publique - Hopitaux De Paris (aphp)

Institut Du Cerveau Et De La Moelle Epiniere (icm)

Assistance Publique-hopitaux De Paris

Université Pierre Et Marie Curie

Centre National De La Recherche Scientifique-cnrs

Inserm

Jean Lorenceau

Pierre Pouget

Pierre Daye

Suzon Ajasse

Disclosed is a device including a detector producing a signal depending on variations of the pupil diameter of an eye of a subject, a display for presenting, to the subject, a light pattern subdivided into a plurality of regions, and an analyzer receiving the signal of the detector and analyzing the frequential content thereof. The display is controlled such that each region has a light intensity modulated at a respective modulation frequency, the modulation frequencies being different from one region to the next.

Ocular observation device

Evaluation of the perception of colors by mammals with a view to obtaining a characteristic biomarker of each tested subject takes advantage of the slow pupillary oscillatory response to generate an objective neurological signature of this perception of colors. A method based on pupil frequency tagging is used at a tagging frequency Fadapted to the pupil response speed. A dynamic two-color stimulus is displayed, this stimulus comprising a two-color pattern the colors of which are inverted at the frequency F, one of the colors gradually varying in a range of possible values. From the pupillary response, a signal representative of the oscillation power of the pupil is generated. The minimum of this signal corresponds to the relative iso-luminance of the tested pair of colors.

Biomarker of the colour perception of a mammal subject based on pupil frequency tagging

Growing community of inventors

Paris, France

Jean Lorenceau