**Figure 3.** **Nuclear volume and fraction for mouse lenses between 2–30 months of age.** Lines on the plots reflect mean ± SD of n = at least 8 lenses per age. The graph next to the data plots shows the 95% confidence interval. Any comparisons not crossing the dotted line are statistically significant (p < 0.05). (**A**) The volume (mm^{3}) of the lens nucleus steadily increases with age. (**B**) Since nuclear volume increases more than lens volume with age, the nuclear fraction (nuclear/lens volume) increases with age.