Visual snow refers to the phenomenon of seeing thickly dotted bright spots when people are watching things, which is most distinct when people are looking at the skies at night or watching where the light has just been turned off. Visual snow is usually caused by overuse of eyes, excessive fatigue, high work and life pressure, malnutrition, and so on. In some cases people get slight symptom of visual snow, and as long as they take good rest and adequate sleep, and stay in a relaxed mood, then the visual snow will gradually disappear. Therefore, if you get visual snow, you should ensure good rest and sufficient sleep every day; eat more vegetables and fruits and dairy products that are good for your eyes, keep in a good mood and not be too worried or anxious. If your conditions are still serious, you should go to the doctor's for an eye examination and take correspondent treatments.