Immunohistochemical staining against CNTF of retinal paraffin sections of a 2-month-old lens-injured RCS rat. In the lens-injured eye, CNTF-positive cells are visible mainly in the ganglion layer. Some photoreceptor nuclei with CNTF immune reactivity were also found. Scale bar: 50 μm. GCL: ganglion cell layer, IPL: inner plexiform layer, INL: inner nuclear layer, ONL: outer nuclear layer, and PR OS: photoreceptor outer segments.