Figure 9. Number of Fluoro-Gold-traced retinal ganglion cells in control and experimental retinas at 90 and 180 days after light exposure. The mean numbers (±standard deviation [SD]) of retinal ganglion cells (RGCs) in these groups were 42,477±3,953, 41,015±3,045, and 40,566±4,146, respectively. The numbers of RGCs were not significantly different between control (white bars) and experimental retinas (black bars) at any time point analyzed (Mann–Whitney, p>0.05), or between the two groups of experimental animals (t test, p>0.05) or the left and right retinas counted in each group analyzed (t test for control and 90 days after light exposure [ALE] groups and Mann–Whitney test for the 180 days ALE group, p>0.05). n=number of retinas.