The technique means only two or three tiny key-hole incisions are made in the cornea, with the unhealthy section removed using special instruments and the donor cornea inserted through the opening.

BBC: New eye surgery shortens recovery

Surgeons who do key-hole surgery have used 3D systems like this to train, but UK Haptics see their system as having a more widespread appeal to a large number of nurses.

BBC: NEWS | Technology | Virtual veins give nurses a hand

One of the key discoveries in the black-hole story came from an analysis of just 150 photons (particles of light) that had spent 12 billion years traveling across the cosmos to us.

WSJ: Book Review: Gravity's Engines