In some. For people who have macular degeneration of intermediate or high risk of progression (something your eye doctor can determine by exam), than the areds formula of vitamins has been proven to decrease the risk of severe vision loss by 25%. For those with mild findings, only a family history of amd but a normal exam and the general public, the eye vitamins have not been proven beneficial.
Kind of. The age related eye disease study (areds) showed that vit c, vit e, beta carotene and zinc at moderately high daily doses can reduce risk of conversion from dry to wet macular degeneration. Preventing blindness should include routine eye exams to determine what prevention strategy suits your needs.