“…The aforementioned experimental studies seem to exclude any alteration of neural retina until the latest stages of the disease, when inner retina degenerates because of melanin and lipofuscin deposits. Clinical reports described Coats-like vascular abnormalities with subretinal exudation, generalized subretinal alterations, and cystoid macular edema in retinitis pigmentosa [24,25,26]. The fluorescein angiography better defined the general impairment of the vascular retinal layer: the arteries were described as narrow, containing dye in a concentration lower than usual, with abnormal delay in filling of the arterial and venous vessels [9,27].…”