| Section2 = | Section7 = | Section8 = }} Zeaxanthin is one of the two carotenoids contained within the retina of the eye. Within the central macula, zeaxanthin is the dominant component, whereas in the peripheral retina, lutein predominates. Lutein and zeaxanthin have identical chemical formulas and are isomers, but they're not stereoisomers. The main difference between them is in the location of a double bond in one of the end rings. This difference gives lutein three chiral centers whereas… (More on Zeaxanthin)