Role in Human Eyes
Lutein was found to be concentrated in the macula, a small area of the retina responsible for central vision. The hypothesis for the natural concentration is that lutein helps keep the eyes safe from oxidative stress and the high-energy photons of blue light. Various research studies have shown that a direct relationship exists between lutein intake and pigmentation in the eye.
Lutein may play a role in Haidinger's brush, an entoptic phenomenon that allows humans to detect polarized light.
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