It is estimated that 90% of what we learn during our lifetime is learned through use of the eyes. Wouldn't it be a terrible mistake to take the health of your hard-working eyes for granted? Sun fatigue, eye strain, and lack of nutrients in the diet can lead to free-radical damage to your eyes—Swanson Synergistic Eye Health can help. Lutein and zeaxanthin are the only two carotenoids your body selects for protection in the eyes, they occur in certain colorful fruits, vegetables, flowers and shellfish. One of the most important abilities of zeaxanthin and lutein is filtering out near-to-UV blue sunlight, potentially the most damaging wavelength of visible light, in the retina's light-sensitive macula cells. Your body can't make lutein or zeaxanthin itself, leaving diet and supplementation as the only means to acquire these vital vision antioxidants.