Impossible to know. To the best of my knowledge there has been absolutely no research on the use of eyebright for cataracts. Even if it helped, it would be hard to show if it cured them before they started- this would involve people without cataracts using it regularly, and I doubt few would be motivated to try this. See http://www. Naturalnews. Com/035446_cataracts_surgery_alternatives. Html for more on natural rx's.