At the age of 20 days, the proportion (%) of CD68+ cells in the ganglion layer (relative to the total retina) in OXYS rats was significantly higher than that in Wistar rats (p < 0.01; Fig. 4D) and decreased with age and with progression of retinopathy, but the proportion of CD68+ cells in the outer plexiform layer increased (Fig. 4F; Table 1). Here, CD68 is linked to retinal disorder.