Lutein helps filter out high energy blue light from the sun and artificial light before it reaches those important photoreceptor cells.Blue light may otherwise induce oxidative stress and possible free-radical damage to the eyes. Zeaxanthin is preferentially placed in the very center of the macula. This is the area most responsible for sharp, central vision. Due to this positioning, zeaxanthin may provide additional benefits to lutein supplements for eye health.** Lutein and zeaxanthin both nutritionally support the health of your eyes to support healthy vision.