Blind Man on a Motorcycle – Blindsight from Bilateral Occipital Lobe Infarcts

A 55-year-old man with significant cardiovascular risk factors (including ischemic heart disease) and medication noncompliance presented with sudden bilateral vision blurring and left-sided throbbing headache. Initial examination revealed bilateral visual acuity reduced to hand movements, with reduction in color saturations, but normal optic nerve appearances with no relative afferent pupillary defect. Initial CT brain was unremarkable. The next day, his vision spontaneously improved to 6/9 (right eye) and 6/15 (left eye) without specific intervention. Subsequent MRI demonstrated bilateral occipital lobe infarcts. In this case, our patient demonstrated blindsight – preserved unconscious visual processing despite absent conscious perception. He manifested by his ability to safely ride a motorbike to the hospital during his visual impairment. This presentation contrasts with classic Anton syndrome (where patients deny blindness and confabulate), representing instead what some term “inverse Anton syndrome.” The case illustrates the critical dissociation between conscious visual perception (mediated by V1) and unconscious visually-guided behavior (subserved by subcortical pathways including the superior colliculus and pulvinar). Clinicians must recognize this phenomenon both for its rehabilitative potential and its safety implications, particularly when patients engage in hazardous activities without awareness of their visual deficits. This case provides unique first-hand insights into blindsight from the patient’s perspective, while advancing our understanding of visual processing resilience following occipital lobe injury