Figure 5. Detection of mast cells. A: Typical photographs of placebo- (left) and mitomycin C(MMC)- (right) treated eyes stained with toluidine blue three weeks after trabeculectomy. Bars represent 100 μm. Arrows demonstrate positive cells. B: The numbers of mast cells per mm² in control, placebo- and MMC-treated eyes are shown. Values are represented as means±SE. The symbol (†) indicates p<0.2 compared with placebo-treated eyes.