Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Anthocyanins are a group of flavonoid compounds responsible for the red, blue, and purple pigmentation in many fruits and vegetables, such as blueberries, blackcurrants, and elderberries. Their use in supporting eye health is largely based on both traditional use and emerging scientific evidence. Historically, anthocyanin-rich berries like bilberry were reputed to improve night vision, particularly among World War II pilots, though this anecdote has limited direct scientific backing.

Recent research has begun to examine anthocyanins for their antioxidant properties, which may help protect ocular tissues from oxidative stress—a factor implicated in age-related macular degeneration (AMD) and other eye diseases. Several small-scale human and animal studies suggest that anthocyanin supplementation may improve visual acuity, reduce eye fatigue, and increase retinal blood flow. However, clinical trials are generally limited in size, duration, and methodological rigor. Meta-analyses and systematic reviews indicate that while there is some promise, the evidence is not yet robust or consistent enough to draw strong conclusions.

Overall, the use of anthocyanins for eye health is supported by a moderate level of scientific evidence, primarily due to their antioxidant effects and some preliminary positive findings in clinical studies. However, more large-scale, well-controlled trials are needed to firmly establish efficacy.

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