Figure 2. Average slit lamp grades of X-irradiated and control lenses. Slit lamp analysis was performed as described in Methods on the lenses from 12 mice at each time point. The slit lamp grades for lenses from X-irradiated mice are depicted as filled diamonds and control lenses as open squares. The value for the 28-month unirradiated controls is from [21]. The mice were X-irradiated at 3 months of age. The lines were fit by eye.