Figure 5. Mitochondrial membrane potential after dexamethasone exposure. Mitochondrial membrane potential in dexamethasone-exposed human lens epithelial cells did not differ significantly from the control group. The experiment was repeated eight times with identical results. Changes in mitochondrial membrane potential are expressed as the ratio of red signal (Ex 540 nm, Em 590 nm) to green signal (Ex 485 nm and Em 535 nm). Mean ±SEM are given.