**Figure 6. **Physiologic rescue of Royal College of Surgeons (RCS) rats at 4 (**A**, **B)** and 8 (**C**, **D**) weeks after injection. The amplitudes of a- (**A**, **C**) and b- (**B**, **D**) waves were measured and plotted as each point on the graph. Each bar on the graph represents the mean amplitude for each
group. PEDF-NP-treated eyes showed significant preservation of a- and b-wave amplitudes at 8 weeks after injection, compared
with PEDF-treated eyes (both p=0.0339).