According to this
University of Oxford News report:
University of Oxford surgeons at Oxford's John Radcliffe Hospital have performed the world's first operation inside the eye using a robot.
The device is designed to eliminate unwanted tremors in the surgeon’s hand – such as through their pulse – so tiny surgical manipulations can be safely carried out within the eye.
The robot acts like a mechanical hand with seven independent computer-controlled motors resulting in movements as precise as 1000th of a millimetre in scale.