Bilberry Extract 40mg by Natural Factors 60 Capsule Bilberry Extract Standardized Herbal help for visual acuity problems vascular disorders especially fragile capillaries helpful for hemorrhoids and diarrhea Bilberry extract has become the leading herbal prescription for the maintenance of healthy vision and for the treatment of many eye diseases. Bilberry (Vaccinium myrtillus) the European cousin to the blueberry contains active ingredients that support vision and was frequently used by World War II RAF pilots to enhance night vision. Studies with bilberry show that it helps eyes adapt to the dark especially after prolonged exposure to bright light and improves visual acuity in dim light. The active ingredients in bilberry anthocyanosides are a group of flavonoids that increase the production and integrity of collagen a protein that forms connective tissue in the body. Bilberry is also used to treat artery vein and capillary disorders.