ITGAM and glaucoma: To further confirm that monocyte-platelet aggregates were present in the ONH in glaucoma, immunofluorescence using antibodies against CD41 (a platelet marker, green) and CD11b (a monocyte maker, red) was performed in longitudinal sections of D2 and D2-Gpnmb+ ONH tissue (n = 4 / group, see upper right panel for ONH location for all upper and middle panels).