The four ingredients in this formula, including bilberry, eyebright, quercetin and rutin, help support vision health. Bilberry, known as the European blueberry, features naturally occurring anthocyanidins, which are powerful free-radical fighters. Eyebright's long history of usage for eye health goes all the way back to the 14th century, although some herbalists believe it was used in antiquity. Together with bioflavonoids rutin and quercetin, these botanicals offer a comprehensive protection plan for the precious health of your eyes.