What is Lutein Eye Complex with Bilberry? Lutein Eye Complex with Bilberry is a combination product formulated to promote healthy eyes & vision. What Does Lutein Eye Complex with Bilberry Do? Tissues that make up the eye are vulnerable to damage by free radicals. Free radicals are chemicals, which are created by our own metabolism as well as from environmental factors such as pollution, UV light & smoking amongst other things. Antioxidant substances in Lutein Eye Complex with Bilberry may protect they eyes against free radical damage.