Synopsis

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

Anthocyanins are a class of flavonoid compounds found in various fruits and vegetables, such as blueberries, blackcurrants, and purple sweet potatoes. Their use for supporting eye health, particularly night vision and protection against retinal damage, has scientific as well as traditional roots. Historically, British Royal Air Force pilots in World War II reportedly consumed bilberry jam (rich in anthocyanins) to enhance night vision, though this anecdote lacks direct validation.

Modern research has examined the potential mechanisms by which anthocyanins may benefit eye health. Laboratory and animal studies indicate that anthocyanins possess antioxidant and anti-inflammatory properties, which may help protect retinal cells from oxidative stress and light-induced damage. Some small human clinical trials have reported improvements in night vision, ocular blood flow, and symptoms of eye fatigue with anthocyanin supplementation, particularly from bilberry and blackcurrant extracts. However, these studies often suffer from methodological limitations, small sample sizes, and inconsistent findings.

Major reviews and meta-analyses have concluded that, while there is some evidence to suggest anthocyanins can support certain aspects of eye function, the overall quality and quantity of clinical research is insufficient for strong recommendations. Therefore, the use of anthocyanins for eye problems is supported by scientific rationale and limited human evidence, but further large-scale, well-controlled trials are needed to confirm efficacy.

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