The ultra-thin lens that could shrink your camera

Engineers at the California Institute of Technology are working on creating super-thin lenses.

The new lenses are not made of glass, but of silicon and could revolutionise the size of items like cameras and phones.

In an online exclusive BBC Click's Farshad Bayan spoke to senior researcher Amir Arbabi about the project.

More at BBC.com/Click and @BBCClick.