Eyebright, also known as EUPHRASY, is an herb that has been used for centuries to treat eye ailments. It is a small, flowering plant with yellow or white flowers and is native to Europe, Asia, and North America. Eyebright has been used to treat conjunctivitis, styes, and other eye infections. It is believed to have anti-inflammatory and antioxidant properties, which may help reduce redness and irritation in the eyes.