Investigating Brain Function in People With and Without Visual Snow Syndrome Using Adaptation to Visual Stimuli

Inclusion Criteria for People with Visual Snow Syndrome: * Between the ages of 18 and 60 years old * Normal (20/25 or better in each eye) or corrected-to-normal vision (MR-compatible glasses will be provided as needed) * Ability to comply with study instructions * Individuals who have a current diagnosis of VSS from a neuro-ophthalmologist or meet diagnostic criteria of VSS (experience of dynamic dots across the visual field persisting longer than 3 months and at least 2 of the following additional visual symptoms: palinopsia, entoptic phenomena, trails behind moving objects, photophobia, or nyctalopia) * Individuals living in Minnesota within 2 hours of the study site Inclusion Criteria for Non-snow Controls: * Between the ages of 18 and 60 years old * Normal (20/25 or better in each eye) or corrected-to-normal vision (MR-compatible glasses will be provided as needed) * Ability to comply with study instructions * Individuals living in Minnesota within 2 hours of the study site Exclusion Criteria for People with Visual Snow Syndrome: * Not being fluent in English or another language for which interpretation/translation services are available * A diagnosed or self-reported intellectual disability * Current substance dependence (besides nicotine), or drug dependence with tolerance or withdrawal within past 12 months * Hallucinogenic substance use within the past 12 months or hallucinogenic substance use within 12 months prior to onset of VSS symptoms * Severe central nervo…