Vision Defender MAC contains three essential eye nutrients - Meso-Zeaxanthin, Lutein and Zeaxanthin - to boost and to enrich the macula – perfect for those who spend a lot of time on their mobile phones or in front of television and computer screens. The macula is the most delicate part of the retina at the back of the eye. Three key macular carotenoids are found highly concentrated in the macula – Meso-Zeaxanthin, Lutein and Zeaxanthin. They protect the macula by acting as antioxidants and absorbing harmful blue light which are typically emitted from smart phones, tablets and television screens. Studies have shown that the three macular carotenoids work together for optimal absorption of blue light at the macula which would otherwise not be achieved by any one of them alone.