[WHEN IT SNOWS ALL YEAR ROUND - VISUAL SNOW].

Visual snow is a neurological condition manifested as a prolonged visual experience of small flickering dots encompassing the entire visual field with additional visual and sensory-neural symptoms. The pathogenesis of this disturbance is unknown, although much progress has been made in recent years. The disturbance has been better defined and characterized. Additional insight into the pathological processes that play a role in this phenomenon has been gained, and different treatment modalities have been tried, some with better results. The purpose of this review is to increase awareness of this syndrome.