Conjunctival and Retinal Vascularization and Small Vessel Disease

Inclusion Criteria: * Patients treated for a minor stroke or transient ischemic attack justifying an MRI. Exclusion Criteria: * Severe eye dryness with conjunctiva hyperhemia, * Taking eye treatments for glaucoma * Inflammatory or infectious eye damage resulting in conjunctiva hyperhemia: conjunctivitis, herpetic keratitis, ulcer, abscess, uveitis, peripheral ulcerative keratitis, interstitial keratitis, scleritis, episcleritis, pingueculitis, scarring eye pemphigoide, acute seizure by closing of the angle, * History of eye surgery. Among eye surgeries, those that can modify the conjunctiva are strabismus surgeries, glaucoma, conjunctiva resection surgery (pterygial or tumor) or wound surgery or finally recent cataract surgery (2 years). * Persons under the legal protection of adults (safeguarding justice, guardianship, curatorship, institutionalized, or under mandate of future protection) * Administrative problems: inability to give about informed information, no coverage by a social security plan, refusal to sign a consent.