Fig. 16. A. Mean cataract grade in calorie-restricted and control Emory mice at 3 to 22 months of age (filled circles, control mice; open circles, restricted mice; values are means ± standard error of the mean. At older ages, error bars are approximately equal in size to the symbol for control animals. B. Percentage of lenses with grade 5 cataract (*p = 0.05). (Taylor A, Jahngen-Hodge J, Smith D et al: Dietary restriction delays cataract and reduces ascorbate levels in Emory mice. Exp Eye Res 61:55–62, 1995.)