Eyebright treats conditions with the eyes such as eye inflammation and conjunctivitis. It also performs anti-catarrhal (a disease of the mucous membranes), anti-inflammatory, and astringent (affecting tissues) actions.
Sources in the Diet
-  – http://www.nytimes.com/1865/03/03/news/chronic-catarrh-its-symptoms-causes-effects-few-practical-remarks-dr-lighthill.html
-  – http://www.merriam-webster.com/dictionary/astringent
-  – The New Encyclopedia of Vitamins, Minerals, Supplements, and Herbs