FIGURE 6.

Mitochondrial dehydrogenase (WST-1) assay for human retinal pigment epithelial cells exposed to benzyl alcohol (BA). After 2, 6, or 24 hours, cells exposed to BA at concentrations equivalent to 0.5 or 1.0 mg/mL had a significant reduction in mitochondrial activity when compared to untreated controls (P<.01 for 2 or 6 hours of exposure; P<.001 for 24 hours of exposure). Similar findings were observed after 24 hours of cell exposure to BA at equivalent concentration of 0.25 mg/mL (P<.001).