On the Weekly Briefing podcast: Prosthetic vision, a common concept in science-fiction, has long been out of reach in reality – but perhaps for not much longer. Researchers are about to start experiments to see if they can restore vision to the blind using prosthetics based on advanced sensor technology. Our guest is Philip Troyk, head of the Pritzker Institute of Biomedical Science and Engineering at Illinois Tech and the CEO of semiconductor supplier Sigenics.