Imagine catching up with your texts, social networking and perhaps the news  without having to log on to a computer or even glance at  a smartphone.

Messages and images would simply appear in front of your eyes, generated by a computerised contact lens.

Of course, you may not always want to be bothered by such messages if you are doing anything so quaint as – for instance – reading a book or going out walking and enjoying the scenery.

But until now the concept of info-vision – the ability to stream information across a person’s field of vision – had belonged to the realms of science fiction, featuring in films such as the Terminator series or TV shows such as Torchwood.

However, scientists have developed a prototype lens that could one day provide the wearer with all kinds of hands-free information.

It could also be used to display directions and TV programmes.