Puritan's Pride Herbavision Gold is formulated with Lutigold Lutein to aid in the maintenance of healthy vision, and includes the popular ingredients Zeaxanthin and Bilberry.(1) Lutein and zeaxanthin are types of pigments found in plants called carotenoids. Even though they cannot be produced in the body, lutein and zeaxanthin from the diet are stored in the eyes, particularly in the part of the retina called the macula. Lutein helps filter out high energy blue light from the sun and artificial light, which may otherwise induce oxidative stress and possible free-radical damage to the eyes.(1) Both Lutein and zeaxanthin nutritionally support the health of your eyes to support healthy vision.(1) Bilberry is a woody, perennial shrub that is related to blueberries and cranberries, and has been traditionally used to help support healthy eye function by World War II pilots.(1)