Your eyes are metabolically demanding tissue, and nutrition genuinely matters for long-term eye health. Most of what makes a difference comes from food. A few well-studied supplements are worth knowing about — and most of the rest is marketing.
Leafy greens (spinach, kale, collards, Swiss chard) are rich in lutein and zeaxanthin — two carotenoids that concentrate in the macula of the retina and act like internal sunglasses, filtering damaging short-wavelength light and quenching oxidative stress.
Orange and yellow vegetables (carrots, sweet potatoes, bell peppers) supply beta-carotene, which the body converts to vitamin A. Vitamin A is essential for the photoreceptor cells of the retina.
Fatty fish (salmon, sardines, mackerel) provide DHA and EPA omega-3 fatty acids — important for retinal cell membranes and meaningful for dry eye management.
Eggs (yolks specifically) are an underrated source of lutein and zeaxanthin in a highly bioavailable form.
The AREDS2 formula was tested in a large NIH-funded clinical trial and shown to slow the progression of intermediate or advanced age-related macular degeneration (AMD). The formula includes vitamin C, vitamin E, zinc, copper, lutein, and zeaxanthin.
AREDS2 is for people already diagnosed with intermediate or advanced AMD — it's not preventive for healthy eyes and not appropriate for everyone. Talk to an eye doctor before starting it, especially if you smoke or have a history of certain cancers.
The evidence for omega-3 supplementation in dry eye is mixed, but many patients report meaningful symptom improvement, particularly with higher-EPA formulations or with triglyceride-form fish oil rather than ethyl ester. Two to three grams per day of combined EPA+DHA is the range studied.
Eating fatty fish two or three times a week likely covers the same ground for most people.
Both are concentrated in the macula and there's strong observational evidence that higher intake correlates with lower AMD risk. Most adults benefit from getting 10 mg of lutein and 2 mg of zeaxanthin daily — easily achievable through diet (a cup of cooked spinach delivers more than 20 mg of lutein) or through a supplement if your diet runs low.
Vitamin D deficiency has been associated with dry eye and several other ocular surface issues. Most adults in northern climates run low, especially in winter, and a basic 1000–2000 IU daily supplement is reasonable for general health.
Zinc is part of the AREDS2 formula and important for retinal function. Excess zinc can cause copper deficiency, which is why AREDS2 includes both.
Bilberry extract, despite the WWII RAF pilots' story, has weak evidence in adults with normal vision. "Eye vitamin" multivitamins not based on the AREDS2 formula are often expensive ways to deliver standard nutrients. Anything sold with claims to "reverse" cataracts, macular degeneration, or glaucoma is not supported by evidence — those need real medical care.
If you're already eating a varied, vegetable-heavy diet, you likely don't need most of what's on the shelf.
Diabetes is the leading cause of new-onset blindness in working-age adults. Controlling blood sugar matters for your eyes as much as anything you swallow.
Hydration affects tear film quality. Smoking dramatically raises the risk of cataract and AMD. UV protection — good sunglasses — is one of the most important nutritional-adjacent decisions you can make.
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