Fig. 10. Cataract risk ratio, high versus low intake (with or without supplements) for plasma levels of β-carotene (also see data in Fig. 8). (Adapted from Taylor A, Dorey CK, Nowell T Jr. Oxidative stress and ascorbate in relation to risk for cataract and age-related maculopathy. In Packer L, Fuchs J [eds]: Vitamin C in Health and Disease. New York: Marcel Dekker, 1997.)