Participants will range from those with no AMD and little or no drusen in either eye through end stage AMD (geographic atrophic, retinal pigment epithelial detachment, or other signs of neovascular/exudative disease) in one eye. Participants will be classified with the AREDS System for Classifying Age-Related Macular Degeneration and will exhibit a range of severities of AMD with at least half exhibiting unilateral advanced AMD (geographic atrophy or neovascular AMD) and half at high risk of progression. Inclusion criteria are as follows: