IL6 and macular retinal edema: Vitreous fluid levels of VEGF, sICAM-1, and IL-6 were also significantly correlated with the severity of macular edema in the CRVO group (ρ = 0.49, P = 0.029, ρ = 0.66, P = 0.003, and ρ = 0.61, P = 0.006, respectively) (Figures 1A-C).