Evidence supporting the use of: Blueberry
For the health condition: Eye Problems

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Synopsis

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

Blueberries (and more specifically, closely related bilberries) have a long history of traditional use in Europe for supporting eye health and vision. The traditional belief that blueberries or bilberries improve night vision gained popularity during World War II, when British Royal Air Force pilots reportedly consumed bilberry jam to enhance their night flying abilities. This anecdote fueled interest in berries as natural vision aids. From a scientific perspective, blueberries are rich in anthocyanins, which are antioxidant compounds thought to protect retinal tissues and blood vessels in the eye. However, clinical evidence specifically linking blueberry consumption to improved eye health or vision is limited and generally of low quality. Most studies have been conducted with bilberry extracts, not blueberries, and results are mixed. Some small studies suggest possible benefits in reducing eye fatigue and improving some aspects of visual function, but these findings have not been consistently replicated in rigorous, large-scale trials. Reviews by scientific organizations, such as the American Academy of Ophthalmology, conclude that while blueberries are healthy and may contribute to overall wellness due to their antioxidant content, there is insufficient scientific evidence to recommend them specifically for preventing or treating eye diseases. Thus, the use of blueberries for eye health is primarily rooted in tradition, with limited scientific backing.

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