Eyebright Liquid may be of benefit to; Those who wish to help keep the eyes looking bright & sparkling clean. People with blood shot eyes Those who experience constant irritation in the eye People who have jobs that involve straining the eye, such as working on a pc for long periods of time Those who need to ensure proper nourishment to the eyes Those who have been repeatedly exposed to smoke & sunlight People with tired eyes Those want to maintain good eye health None currently known Shake well before use. Place 20-30 drops (1ml) in a small amount of warm water & drink. Repeat two to three times daily Water, Ethanol, Eyebright Extract (euphrasia officinalis).