The most common triggers are foods and visual effects.Visual TriggersHigh contrast black and white stripes; for example, Venetian blinds against a bright sky.Dim light with low contrast; for example trying to read in a badly lit room.Very bright light shining into the side of the eye.Flashing light at 10 - 60 Hz (for example, a badly adjusted computer screen).Food TriggersMany different types of f