Homeopathic Formula. Relieves Tired, Strained Eyes. Gentle Enough For Children, Strong Enough For Adults. Similasan's Unique Active Response Formula Quickly Stimulates the Eye's Natural Ability to Relieve Eye Strain Due to Intense Computer Work, Tv, Reading, Writing, or Driving At Night. Sting Free, No Worries About Chemical Vasoconstrictors, Rebound or Contradictions. Similasan's High Swiss Quality Standards Have Provided Health Relief to Millions of People For Over 20 Years.