Study of Bipolar Disorders and Retinal Electrophysiological Markers

"The Retinaute® is a portable medical device developed by BioSerenity, France, for performing flash and pattern ERG. It comes in the form of a virtual reality headset, which can be used in outpatient facilities. It is non-invasive and uses skin electrodes for the collection of parameters.~ERG signals will be supplemented with 4 EEG channels, via cup electrodes applied to the skull and allowing the concomitant performance of an EEG."

"Actigraphy is an ecological and non-invasive method allowing a reliable characterization of the sleep/wake cycle. It is a portable system for continuously measuring the motor activity of an individual and appreciating the alternation of activity periods (wakefulness) and rest periods (sleep).~An actigraph (MotionWatch8®, CamNtech) looks like a wristwatch that will be worn continuously, by convention on the wrist of the non-dominant hand, over periods ranging from several days to several weeks (here 21 days). Actigraphy does not present a known risk."

The purpose of this assessment is to establish a cognitive profile for each participant. It uses a series of tests widely described in the literature and commonly used today.

The Spectral Domain Optical Coherence Tomography (SD-OCT) is a modern ocular imaging process using infrared radiation and allowing to obtain in a few seconds, and in a non-invasive way, images in section of the eye. The OCT-Angiography (OCT-A) module increments on the OCT. It can detect the movement of the blood elements from sequential SD-OCT slices taken at the same location of the retina and obtain a map of the retinal and choroidal vessels, without injection of fluorescent dye. The device used for both exams will be the OCT spectral RS 3000 Advance 2 + Angioscan (NIDEK, Gamagori, Japan). SD-OCT and OCT-A examinations are fast, painless, non-contact and last less than a minute. There is no particular risk.