Figure 1. Positive correlation between age and heparan sulfate levels in vitreous samples. A, B: The age was uncorrelated with the level of vascular endothelial growth factor (VEGF; A; p=0.855, R²=0.002), whereas it was positively correlated with heparan sulfate (HS) levels (B; p=0.020, R²=0.327) in the vitreous samples from idiopathic maculopathies (n=17).