Fixation off sensistivity is a electrographic marker of occipital lobe epilepsy. The report describes a 11 year old with infrequent seizures responsive to treatment with valproate who was found to have occipital epileptiform discharges which appeared only during eye closure. The typical phenomenology of visual aura or autonomic seizures as seen in benign occipital epilepsies is not mandatory to be associated with FOS. The spectrum of various epilepsy syndrome which display this typical finding is discussed.
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