I love having my perspective shaken up. A glass screen with no buttons sounds like the most excluding device imaginable, McCausland acknowledges, yet his phone became the most accessible tool he’s ever used. He’s similarly excited by the Meta Specs – I don’t think that’s what they’re actually called – which are always on and offer live video interpretation, telling you what you’re looking at. Like a phone but, crucially, wearable. “The one thing blind people never have is two hands free,” he observes.