Blueberry(Ericaceae Vaccinium spp.) is a kind of perennial deciduous or evergreen fruit shrubs, mainly
found in subarctic regions of the world as in Sweden, Finland and Ukraine, etc. Bilberries contain dense
levels of anthocyanin pigments, which was said popularly to have been used by World War II RAF pilots
to sharpen night vision. In fork medicine, Europeans have been taking bilberry for a hundred years.
Bilberry extracts entered the healthcare market as a kind of dietary supplement for effects on vision
enhancement and visual fatigue relief.