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==Función no ollo humano==
LuteinA wasluteína foundestá toconcentrada be concentrated in thena [[maculamácula ofda retina|macula]], a smallunha areapequena ofárea theda retina responsibleresponsable forda centralvisión visioncentral. TheA hypothesishipótese forque theexplica esta concentración natural concentrationdi isque thata luteinluteína helpsaxuda keepa manter theos eyesollos safeprotexidos fromdo [[oxidativeestrés stressoxidativo]] ande thedos high-energy[[fotón]]s photonsde ofalta blueenerxía lightda luz azul. VariousVarios researchestudos studiesindicaron haveque shownhai thatunha arelación directdirecta relationshipentre existso betweenconsumo luteinde intakeluteína ande a [[pigmentationpigmentación]] inmacular thedo eyeollo.<ref name="Malinow1980">{{cite journal |author=Malinow MR, Feeney-Burns L, Peterson LH, Klein ML, Neuringer M |title=Diet-related macular anomalies in monkeys |journal=Invest. Ophthalmol. Vis. Sci. |volume=19 |issue=8 |pages=857–63 |date=August 1980 |pmid=7409981 |url=http://www.iovs.org/cgi/pmidlookup?view=long&pmid=7409981}}</ref><ref name="Johnson2000">{{cite journal |author=Johnson EJ, Hammond BR, Yeum KJ, et al. |title=Relation among serum and tissue concentrations of lutein and zeaxanthin and macular pigment density |journal=Am. J. Clin. Nutr. |volume=71 |issue=6 |pages=1555–62 |date=June 2000 |pmid=10837298 |url=http://www.ajcn.org/cgi/content/full/71/6/1555}}</ref><ref name="Ref_c">Landrum, J., ''et al.'' Serum and macular pigment response to 2.4 mg dosage of lutein. in ARVO. 2000.</ref><ref name="Berendschot2000">{{cite journal |author=Berendschot TT, Goldbohm RA, Klöpping WA, van de Kraats J, van Norel J, van Norren D |title=Influence of lutein supplementation on macular pigment, assessed with two objective techniques |journal=Invest. Ophthalmol. Vis. Sci. |volume=41 |issue=11 |pages=3322–6 |date=October 2000 |pmid=11006220 |url=http://www.iovs.org/cgi/content/full/41/11/3322}}</ref><ref name="Aleman2001">{{cite journal |author=Aleman TS, Duncan JL, Bieber ML, et al. |title=Macular pigment and lutein supplementation in retinitis pigmentosa and Usher syndrome |journal=Invest. Ophthalmol. Vis. Sci. |volume=42 |issue=8 |pages=1873–81 |date=July 2001 |pmid=11431456 |url=http://www.iovs.org/cgi/content/full/42/8/1873}}</ref><ref name="Duncan2002">{{cite journal |author=Duncan JL, Aleman TS, Gardner LM, et al. |title=Macular pigment and lutein supplementation in choroideremia |journal=Exp. Eye Res. |volume=74 |issue=3 |pages=371–81 |date=March 2002 |pmid=12014918 |doi=10.1006/exer.2001.1126 |url=http://linkinghub.elsevier.com/retrieve/pii/S0014483501911261}}</ref><ref name="Johnson2005">{{cite journal |author=Johnson EJ, Neuringer M, Russell RM, Schalch W, Snodderly DM |title=Nutritional manipulation of primate retinas, III: Effects of lutein or zeaxanthin supplementation on adipose tissue and retina of xanthophyll-free monkeys |journal=Invest. Ophthalmol. Vis. Sci. |volume=46 |issue=2 |pages=692–702 |date=February 2005 |pmid=15671301 |doi=10.1167/iovs.02-1192 |url=http://www.iovs.org/cgi/content/full/46/2/692}}</ref>
A luteína pode ter un papel no [[fenómeno entóptico]] chamado [[cepillo de Haidinger]], que permite aos humanos detectar a [[luz polarizada]].
Lutein may play a role in [[Haidinger's brush]], an [[entoptic phenomenon]] that allows humans to detect [[polarized light]].
===Dexeneración macular===
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