Around the world, most conversations about eye health focus on things like glasses, screen time, or supplements. But in public-health circles, the story actually starts much deeper—literally underground. Root vegetables, especially the ones loaded with carotenoids, play a major role in keeping our eyes healthy.
Vitamin A deficiency is still the leading cause of preventable childhood blindness around the globe, according to the World Health Organization. It contributes to an estimated 250,000 to 500,000 cases every year, especially in places where people don’t have access to foods rich in provitamin A.
These root vegetables won’t erase bad eyesight or magically fix age-related problems, but they provide key nutrients that help your retina and optic nerve do their jobs properly.
Carrots
Carrots have long been crowned the “vision vegetable,” and while the lore sometimes gets exaggerated, the science behind their reputation is solid. A single large carrot—or about one cup chopped—delivers around 100% of the daily vitamin A requirement, mainly in the form of beta-carotene and alpha-carotene.
These carotenoids convert to vitamin A in the body, which is essential for forming rhodopsin, the pigment the eyes rely on for adapting to low light. This is the biological root of the famous “carrots help with night vision” claim.
Research backs up these effects. In a controlled study involving pregnant women with night blindness, eating roughly 4.5 ounces of cooked carrots six days a week significantly improved dark-adaptation responses, performing comparably to vitamin A supplements.
And modern reviews continue to highlight carrots’ “nutraceutical” carotenoids, noting antioxidant and anti-inflammatory benefits relevant to macular degeneration, cataracts, glaucoma, and nyctalopia.
Sweet Potatoes (Especially Orange and Purple)
If carrots are eye-health icons, orange sweet potatoes are their nutrient-dense cousins. One cup of baked orange sweet potato with the skin provides more than twice the daily beta-carotene requirement, making it one of the richest natural sources of vitamin A precursors.
Public-health programs in Africa and Asia have successfully used biofortified orange-fleshed sweet potatoes to improve vitamin A status in children and women, reducing deficiency-related vision problems when they replace paler varieties.
Purple sweet potatoes add another protective layer: anthocyanins, which early studies suggest help shield retinal cells from oxidative damage. Eye-care clinicians frequently group sweet potatoes with carrots as top “vision foods,” emphasizing that they deliver beta-carotene plus vitamin C and potassium—nutrients needed for healthy blood flow in the retina’s tiny vessels.
Beetroot
Beetroot enters the eye-health conversation not because of vitamin A, but because of its exceptional nitrate content. These nitrates convert into nitric oxide, a compound that relaxes blood vessels and improves circulation. Since nitric oxide also influences blood flow in retinal and uveal tissues, researchers have begun examining how nitrate-rich foods might affect glaucoma and other vascular eye diseases.
A crossover study in healthy adults found that beetroot juice lowered blood pressure and even altered macular vessel density, suggesting a direct dietary influence on ocular microcirculation. While it didn’t significantly change intraocular pressure, large population studies show that people with higher overall nitrate intake tend to have lower rates of primary open-angle glaucoma, particularly in early-onset subtypes.
This makes beetroot an “eye-circulation ally”—a food that helps maintain healthy optic-nerve and macular perfusion in ways other vegetables can’t.
Parsnips
Pale and often overlooked, parsnips still contribute meaningfully to visual wellness. They belong to the same botanical family as carrots and offer vitamin C, vitamin K, folate, potassium, fiber, and small amounts of carotenoids.
Because vitamin C is heavily concentrated in ocular tissues, parsnips help defend the lens and retina against oxidative damage involved in cataracts and age-related macular degeneration.
They’re also an easy way to diversify carotenoid intake. Since eye-health organizations emphasize variety rather than chasing one “superfood,” pairing parsnips with other roots ensures a broader spectrum of antioxidants and vascular-support nutrients.
Turnips
Turnip roots provide modest amounts of vitamin C, fiber, and some carotenoids, and they’re frequently grouped with other roots that support collagen formation in the cornea and sclera. Vitamin C also helps regenerate vitamin E, another antioxidant used heavily in ocular tissues.
Observational research shows that diets rich in vitamins A and C correlate with a lower likelihood of glaucoma and other chronic eye conditions, supporting a place for vitamin C–bearing roots like turnips in a vision-focused diet. Their versatility is an added benefit: when cooked with carrots or sweet potatoes, turnips deliver vitamin C while the orange roots provide carotenoids—a nutrient pairing repeatedly tested in major eye-supplement trials.
Turnip greens shouldn’t be ignored either. The leaves are rich in lutein and zeaxanthin, meaning a “root-to-leaf” dish can combine macular pigments with vitamin C and fiber all in one meal.
Radishes (Red and White)
Radishes may seem like small, crisp salad afterthoughts, but they’re surprisingly relevant to eye health. White radishes in particular provide vitamin C, potassium, magnesium, and copper, all nutrients involved in vascular health and antioxidant defense.
Some radish varieties also contain anthocyanins—the same family of compounds linked to improved dark adaptation and retinal protection in experimental studies.
Positioning radishes as “micro-doses of antioxidant support” is fitting: they complement carotenoid-heavy vegetables by delivering polyphenols and plant nitrates. In fact, early research suggests radish-derived nitrates may even enhance cerebral blood flow—an intriguing parallel to nitrate-driven improvements seen in ocular circulation.
Rutabaga
Rutabaga, or swede, is a hearty root that packs vitamin C, potassium, carotenoids, and fiber into a storage-friendly package. Many nutrition resources group rutabaga with other roots that supply vitamin A precursors and vitamin C—important nutrients for populations at risk of deficiency-related eye disease.
Culinarily, rutabaga works well as a potato substitute, adding more vitamin C and fiber while maintaining the comforting textures people love. Their long storage life also makes them practical for maintaining a consistent intake of eye-supportive nutrients without relying solely on delicate greens.
Potatoes (Especially with Skin and Colored Varieties)
Standard white potatoes aren’t vision superstars, but they do provide vitamin C, potassium, fiber, and B vitamins. Purple and red potatoes, however, contribute anthocyanins, giving them antioxidant properties that may protect neural and ocular tissues from oxidative stress.
Because hypertension is a major risk factor for retinal vascular conditions—and may interact with glaucoma risk—the potassium in potatoes can play a supporting role in overall eye health. And importantly, much of the antioxidant and mineral content is concentrated in the skin.
Keeping the skin on a medium potato gives you 4 grams of fiber (about 16% of your daily needs), 30% more vitamin C, and twice as much potassium compared to a peeled potato.
Celeriac (Celery Root)
Celeriac offers vitamin K, vitamin C, fiber, and small contributions of vitamin A. Eye-health nutrition lists often highlight vitamin K and antioxidants for supporting vascular integrity in the retina’s delicate capillaries. Celeriac also supplies trace minerals—zinc, copper, selenium—that help transport vitamin A, build protective pigments, and counter oxidative damage.
One of its strongest selling points is metabolic: celeriac helps lower the glycemic load of root-heavy dishes. Since diabetes and metabolic disease are major drivers of global vision loss, swapping in celeriac for some potatoes can help protect blood-sugar stability while still delivering flavor.
Estimates from the International Diabetes Federation suggest that about 1 in 3 people with diabetes develop some degree of diabetic retinopathy over their lifetime.
Winter Squash
Though technically a stem-root storage organ, winter squash belongs firmly on this list. Its orange flesh is rich in beta-carotene, lutein, and zeaxanthin—the same pigments that accumulate in the macula to filter blue light and maintain visual performance.
It also provides vitamin C and fiber, mirroring the nutrient pattern of AREDS-style supplements, which reduced progression to advanced macular degeneration by about 25% in high-risk adults.
Beyond the science, squash offers a culinary advantage: it’s easy to turn into soups, roasted wedges, or purees that feel like comfort food while delivering meaningful amounts of macular pigments.
The Bottom Line
Root vegetables won’t cure genetic eye conditions or reverse aging, but they play a powerful supporting role in long-term visual health. They deliver the nutrients—vitamin A precursors, lutein, zeaxanthin, vitamin C, and dietary nitrates—that research consistently links to better retinal function, stronger antioxidant defenses, and healthier blood flow to the optic nerve and macula.
These underground staples offer an accessible, affordable way to nourish the eyes—one colorful, fiber-rich plate at a time.
Disclaimer – This list is solely the author’s opinion based on research and publicly available information. It is not intended to be professional advice.
Disclosure: This article was developed with the assistance of AI and was subsequently reviewed, revised, and approved by our editorial team.
0 Odd American Traditions That Confuse the Rest of the World
20 Odd American Traditions That Confuse the Rest of the World
It’s no surprise that cultures worldwide have their own unique customs and traditions, but some of America’s most beloved habits can seem downright strange to outsiders.
Many American traditions may seem odd or even bizarre to people from other countries. Here are twenty of the strangest American traditions that confuse the rest of the world.
