Figure 1. Retinal flat mounts at P14 and P18 in the ROP model and at P18 in RA samples. Representative lectin-stained flat mounts from rat pups in the ROP model or RA conditions. In the ROP model, avascular retina remains at P14 (A), while in RA, intraretinal vascularization is complete at P14 (C). In the ROP model, after seven cycles of oxygen fluctuations by P14, pups are then moved into RA for 4 days. At P18, intravitreous neovascularization occurs at the junction of vascularized and avascular retina (B).