Regressed Proliferative Diabetic Retinopathy. A, Gross view of eye. There was a membrane (arrow) overlying the macula and optic nerve head (ON). Peripheral to this were laser photocoagulation scars. Dotted lines show the posterior and peripheral retina. B, Representative fluorescein angiogram showing capillary dropout (arrows) and peripheral ischemia. C, H&E section of the posterior retina shows variable cell and photoreceptor segment loss (arrow). D, H&E section of the peripheral retina shows extreme cell loss and disorganized cytoarchitecture. Abbreviations: H&E, heamotoxylin and eosin; ON, optic nerve; RGC, retinal ganglion cell layer; INL, inner nuclear layer; ONL outer nuclear layer; RPE, retinal pigment epithelium layer; PS, photoreceptor segments.