A Case of Unilateral Presentation of Visual Snow Syndrome

Visual snow syndrome is an uncommon disease that is characterized by persistent positive phenomena that look like pixelated static similar to static on a television screen. Diagnostic criteria proposed by Schankin et al. define visual show as symptoms that persist for more than 3 months with at least two additional visual symptoms including, palinopsia, enhanced entopic phenomena, photophobia, or nyctalopia. These symptoms cannot be explained by typical migraine aura or another disorder. Onset may be sudden or gradual, but symptoms generally encompass the entire visual field in both eyes. Here, we present a unique case of visual snow syndrome that initially presents with unilateral symptoms.