Blueberry is a powerful anti-inflammatory. The herb is also a powerful antioxidant and has glucoquinine (lowers blood sugar levels). Blueberry contains flavonoids called anthocyanosides that protect the collagen structures in the blood vessels of the eye.Blueberry is used to treat eye problems such as Macular Degeneration, diabetic neuropathy, and/or cataracts. It is used to treat diaorrhea, vericose veins, and mucous membrane inflammation. The herb is beneficial in the treatment of hardening of the arteries (atherosclerosis) and in eye health.This herb may also help night vision.