Lutein is a yellow carotenoid that is not made in the body, and so it has to be obtained from the diet or through supplements. Like all carotenoids, lutein is an antioxidant, and since it is found in the macula of the eye, it may protect the macula tissue from harmful oxidation by quenching free radicals. The reason that this is of such importance is that it is the macular that is responsible for detailed vision. Furthermore, lutein has also been shown to filter high-energy blue light that can damage the macula.

Lamberts Eyewise provides a full 10mg of lutein (pure, free-form) per tablet, making this Lamberts product one of the strongest on the market. It also contains bilberry, blackberry and grapeseed (as concentrated extracts), since they all have potent antioxidant properties and are renowned for eye health. Bilberries are rich in the flavonoid anthocyanoside, which improves the flow of blood and the delivery of oxygen to the eye.