Figure 1. Percent of live trabecular meshwork (TM) cells after a 25 min exposure to various concentrations of benzalkonium chloride (BAK diluted 1:10 in serum-free media). The number of live cells was normalized to the number of live cells in BSS-treated controls. Data are reported as the mean±standard deviation of n=6 replicates. All concentrations of BAK were significantly different (p<0.05) from BSS-treated controls. There is a dose-dependent decrease in cell viability above 0.005% BAK (diluted 1:10). *=p<0.05.