From the Manufacturer:
Protect your eyes against free-radical damage to keep your vision sharp with the high-powered antioxidant nutrition of Mirtillo Forte Concentrated Liquid Bilberry Extract. Bilberry is renowned as nature's number one vision-health herb, thanks to its rich concentration of powerful antioxidant anthocyanosides that protect delicate eye tissues and support microcirculation. Mirtillo Forte is a highly concentrated bilberry extract, supplying the equivalent of 60 grams of fresh bilberry in each serving. It's derived from flash-frozen bilberry fruit that is concentrated under vacuum at low temperature to preserve the full nutritional content. Each serving supplies 13.3 mg of total anthocyanosides. Mirtillo Forte was developed exclusively for Swanson Health Products by Aboca, one of Italy's leading cultivation and manufacturing companies for medicinal herbs.