Fig. 5. Cataract risk ratio, high versus low intake (with or without supplements) for plasma levels of vitamin C. Types of cataract are any, moderate/advanced, nuclear, cortical, posterior subcapsular, mixed, or cataract extraction. Data for retrospective and prospective studies are presented independently. (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.)