Figure 4. Toluidine blue staining of semithin sections from explants cocultured with the mononuclear fraction. Explants cultured 9 days
with the mononuclear fraction (MNF) had more evident cellular disorganization and large multinuclear tissue invasion of the
subretinal space (arrows). Scale bar equals 20 µm. Abbreviations: inner nuclear layer (INL); inner limiting membrane (ILM);
outer nuclear layer (ONL).