Avocados are rich in two key carotenoids—lutein and zeaxanthin. Everyday activities produce free radicals, but these carotenoids act as potent antioxidants to neutralize them. Essential for eye health, lutein and zeaxanthin shine both solo and as a duo. They're the only carotenoids in the macula, crucial for clear vision. Research ties them to reduced risks of macular degeneration and cataracts.