Figure 4 of Gorbet, Mol Vis 2010; 16:272-282.

Figure 4. Caspase activation following incubation with phosphate or borate-buffered solution. No increase in cells staining positive for FITC-VAD-FMK was observed after cells were incubated for 24 h with either phosphate, borate-buffered solutions, or soaked lenses. Dot plots are representative of the three experiments that were performed.