Figure 1. Slit-lamp appearance of lenses in eyes of 16-day-old Wistar rat pups. A: Lenses in normal (Group I) pup eyes have all remained transparent (grade 0 opacity). B: Lenses in cataract-untreated (Group II) eyes have all become densely opaque (grade +++ opacity). C: Lenses in some cataract-treated (Group III) pup eyes have become mildly opaque (grade + opacity).