A team of physicists from the Applied Optics Group at the University of Kent has developed a new design for an ultrathin, forward-viewing endoscope. Together with partners from King's College London and Moorfields Eye Hospital, they have engineered a device that captures optical coherence tomography (OCT) images of tissue up to about 1 mm beneath its surface. The initial prototype has a diameter of just 0.31 mm, small enough for potential use in retinal surgery.