This is Steve. 95 per cent of his vision is gone, yet he's driving a car. Except he's not really driving it; he's behind the wheel of Google's driverless car.

Google's self-driving car has now completed 200,000 miles of computer-led driving. Steve was part of that testing and loved it:

Here's Steve, who joined us for a special drive on a carefully programmed route to experience being behind the wheel in a whole new way. We organized this test as a technical experiment, but we think it's also a promising look at what autonomous technology may one day deliver if rigorous technology and safety standards can be met.

Soon, these cars will free many people to do something that was unthinkable for them. And then imagine the lives that smart, interconnected cars will save. Be happy, my friends, because we live in a world of wonders.