Bausch & Lomb PreserVision Tablets are based on the AREDS formula an antioxidant vitamin and mineral supplement proven clinically effective in the Age-Related Eye Disease Study (AREDS). AREDS was a 10-year independent study conducted by the National Eye Institute (NEI) of the National Institutes of Health (NIH). Bausch & Lomb PreserVision Tablets are based on the AREDS formula - a high potency anti-oxidant supplement with select vitamins and minerals at levels that are well above those found in ordinary multivitamins and generally cannot be attained through diet alone. Now in convenient to take 4 per day tablets.