Figure 4. Histological analysis of the retinal structure of the L-ORD mice. Retinal changes typically associated with the rd8 phenotype were not observed in either the Ctrp5^+/−;wt/wt or Wt ^wt/wt mice at 20–21 months. In addition, the retinal morphology of these mice lacked gross abnormalities that can be detected with light microscopy. Magnification bar=20 μm.