AI glasses to anticipating falls: firms vie to win £1m for dementia technology

Longitude prize will give one of five finalists money towards creating an innovation for independent living

With their thick plastic frames and wide arms, the chunky glasses look like 3D specs handed out in a 1990s cinema - not the kind of technology you associate with 21st-century science prizes.

But put them on, and it is the real world that takes on a new dimension.