Bilberry extract can be used to protect vision, prevent blindness, glaucoma, cataract, retinal hemorrhage, improve myopia, macular degeneration, diabetic retinopathy, pigmented retinitis and night blindness.Bilberry extract can be used to strengthen cerebrovascular, prevent cerebrovascular diseases, strengthen myocardial blood vessels, strengthen coronary artery, strengthen renal blood vessels, prevent hematuria, urethritis and cystitis caused by rupture of glomerular capillary. Strengthen venous vessels, prevent varicose veins and prevent ulcers. Prevent arteriosclerosis; Prevent thrombosis.