Lamberts Eyewise High Srength Lutein 20mg - Naturally sourced free-form lutein that is ready to be. Plus zinc and riboflavin, both of which are known to contribute to the maintenance of normal.

It also provides bilberry, blackberry and grapeseed, all well-known plant polyphenols, as concentrated extracts. Plus the mineral zinc and the B vitamin riboflavin, both of which are known to contribute to the maintenance of normal vision and to the protection of cells from oxidative stress.
Lutein is a yellow carotenoid that is not made in the body, and so it has to be obtained from leafy green vegetables in the diet. In plants, lutein is produced to help protect the cell contents from damage by sunlight. Our bodies are able to use lutein in the same way as it is deposited in the macula where it filters out the harmful wavelengths in sunlight that can damage the delicate light receptor cells of the macula. 
Research has shown that eating diets that are low in lutein can result in diminished levels of lutein in the macula. To correct this you should try to include leafy green vegetables in your diet, or failing this it is advisable to take a lutein supplement. 

May reduce the negative effects associated with increased digital screen time and blue light exposure
The antoxidant behaviour of lutein helps to fight back against the free radical damage that we all experience as a result of blue light and sun exposure, as well as other factors, such as poor diet. This can reduce our risk of suffering from cataracts, macular degeneration, and age-related loss of vision.