Study: Vitamins E, C, alpha lipoic acid and Retinitis Pigmentosa (2006)
A 2006 study in an animal model of RP found that high dose antioxidants (vitamins E, C, alpha lipoic acid others) significantly reduced oxidative damage in cones, increased cone cell density and preserved cone function. These results, according to the Johns Hopkins authors, suggest that the gradual cone death that occurs after rod cells die is due to oxidative damage, and that antioxidants could provide benefit.
Komeima K, et al. Antioxidants reduce cone cell death in a model of retinitis pigmentosa. PNAS 103:1130-35, 2006.
Learn more about retinitis-pigmentosa.