Retinal Vascular Network and Obstructive Sleep Apnea

Inclusion Criteria: * person who has given oral consent * person who can be followed throughout the study * adult Patient group: \- Patient seen in sleep apnea screening consultation by a pulmonologist and referred for polysomnography diagnosis of OSA Control Group: \- Person initially without obstructive sleep apnea syndrome Exclusion Criteria: * a person who is not affiliated to or not a beneficiary of the national health insurance system * person subject to a measure of legal protection (curatorship, guardianship) * person subject to a safeguard of justice * pregnant, parturient or breastfeeding woman * adult incapable or unable to consent * person with a contraindication to Tropicamide or Neosynephrine * person with a history of eye disease affecting ocular circulation (examples: acute anterior ischemic optic neuropathy, retinal central artery occlusion, retinal central vein occlusion, diabetic retinopathy, glaucoma, uncontrolled hypertonia, AMD, severe myopia...) Control Group: * person with a history of chronic lung problems (e.g. COPD, chronic respiratory failure, etc.) * person with at least one of the following risk factors for obstructive sleep apnea syndrome: * Obesity with IMC≥30 * Alcohol consumption \> 3 glasses per day Exclusion criteria: positive result in one of the 3 self-questionnaires