CLU and open-angle glaucoma: The mean serum clusterin levels were 672.67±323.18 ng/ml (range: 255–1290 ng/ml) in the PEXG group, 625.08±261.14 ng/ml (range: 148–1137 ng/ml) in the PEX group, 632.77±385.30 ng/ml (range: 104–1382 ng/ml) in the POAG group, and 553.05±281.65 ng/ml (range: 129–1074 ng/ml) in the control group.