Figure 2: Effect of various concentrations of aluminium on the viability of ARPE-19 cells. Different concentrations of aluminium were added to the culture medium indicated horizontally as μmol. There was only a weak decrease of viability but was statistically significant at each concentration. Values represent means ± S.E.M. (**p< 0.01; ***p< 0,001; n=24 for each group).