Study of Retinal Function Using Electroretinogram in Regular Alcohol Users (ERICA)

Alcohol is a major public health problem and its neurotoxic effects are, among other things, responsible for altering the functioning of cerebral neurotransmission pathways. The retina is an anatomical and developmental extension of the central nervous system. It is composed of several layers of retinal neurons that share similar anatomical and functional properties with brain neurons. Retinal neurons are notably equipped with a complex system of neurotransmission constituted by the main neurotransmitters that are involved in the central effects of alcohol: glutamate, dopamine, serotonin ... The retina is used here as a site of indirect investigation for abnormal central neurotransmission pathways following regular alcohol use. It is recognized to date as a good site for investigating central abnormalities in neuropsychiatric and addictive disorders. The objective of this project is to study the retinal function using electroretinogram (ERG) in regular alcohol users to isolate potential markers of cerebral neurotransmission abnormalities.

subjects with regular alcohol consumption with AUD according to the DSM 5 without any other substance use disorder (except alcohol) without psychiatric, neurologic or ophthalmologic disease in progress with a negative drug check and Breathalyzer the day of the inclusion - only one visit is planned for this study : an electroretinogram will be realized

subjects with regular alcohol consumption without AUD according to the DSM 5 without any other substance use disorder without psychiatric, neurologic or ophthalmologic disease in progress with a negative drug check and Breathalyzer the day of the inclusion - only one visit is planned for this study : an electroretinogram will be realized

subjects without alcohol consumption without any other substance use disorder without psychiatric, neurologic or ophthalmologic disease in progress with a negative drug check and Breathalyzer the day of the inclusion - only one visit is planned for this study : an electroretinogram will be realized

we measured the waves a, b, oscillatory potentials, back ground noise and i for the flash ERG, the waves P50 and N95 for the pattern ERG and the P1, N1 and N2 for the multifocal ERG

For alcohol consumer with alcohol use disorder : Inclusion Criteria: aged between 18 and 35 years alcohol use disorder according to the DSM 5 affiliation to a social security scheme Exclusion Criteria: psychoactive substance consumption (other than alcohol) psychiatric disease in progress according to the DSM 5 neurologic disease in progress mental impairment making it difficult or impossible to participate to the study major under guardianship or curatorship or under safeguarding of justice pregnant women or feeding people in emergency situation participation to another interventional study retinal disease in progress chronic glaucoma ophtalmic disease affecting the visual acuity ocular infection in progress urinary positive drug check the day of the inclusion postive Breathalyser the day of the inclusion