bbailey57, please investigate thiamin's (vitamin B1) role in eye health and especially macular degeneration. One problem with thiamine is, like vitamin D, it requires adequate magnesium to make it bioactive. Look for a fat soluble form, such as Benfotiamine, that stays active longer than water soluble forms and can pass through the blood/brain barrier. Also a general search on thiamine deficiency will offer you a deeper understanding of this critical vitamin.