Figure 3. Forest plot of the standardized mean difference and 95% confidence intervals of the tumor necrosis factor alpha level in aqueous humor between the patients with open angle glaucoma and the control subjects. The black squares represent individual studies, and the size of the square represents the weight given to each study in the meta-analysis. The diamond represents the pooled estimate, and the horizontal line represents the 95% confidence interval. The pooled results showed that patients with open angle glaucoma had higher tumor necrosis factor alpha levels than the controls.