Interest of Dynamic Measures of the Pupil in Optic Neuritis

Interest of Dynamic Measures of the Pupil in Optic Neuritis

The investigators' hypothesis is that measuring the PCTdynamics would be an easy and reliable symptom to evaluate in pathologies affecting the optic nerve

Physiopathologic study aiming to assess the interest of measuring the lenght of pupil cycle in the dynamic study of the pupillary light reflex.

Inclusion Criteria:

• patients with unilateral optic neuritis or with multiple sclerosis and an optic neuritis in the previous 5 years

Exclusion Criteria:

• previous history of ophthalmic and neurologic pathology
• anisocoria
• minor
• Patient with a measure of legal protection
• Pregnancy
• patient opposition to participation in the study
• no affiliation to social security