Greg Egan's short story, 'Mister Volition' (in Luminous), features an interesting wearable, an brain-biofeedback eye patch, that gives the wearer extra insight

Greg Egan's short story, 'Mister Volition' (in Luminous), features an interesting wearable, an brain-biofeedback eye patch, that gives the wearer extra insight into their own mental processes.