Figure 2. Number of viable cells after dexamethasone exposure. The number of viable human lens epithelial cells as determined by the MTT colorimetric assay was significantly decreased after exposure to dexamethasone for 24 h. The difference in optical density between the wavelength of the sample (570 nm) and the reference wavelength (650 nm) was calculated. Experiments were performed three times in triplicates (n=3). One representative experimental run is shown. Mean±SEM are given; the triple asterisk indicates a p<0.001.