'Laser vision' offers new insights

A system that projects light beams directly into the eye could change the way we see the world.
US firm Microvision has developed a system that projects lasers onto the retina, allowing users to view images on top of their normal field of vision.

It could allow surgeons to get a bird's eye view of the innards of a patient, offer military units in the field a view of the entire battlefield and provide mechanics with a simulation of the inside of a car's engine.