Eye-tracking is an important technology that many would consider a ‘must have’ for the next generation of VR headsets, although that’s just one step towards resolving a long-standing issue in VR that prevents users from seeing the virtual world like they would naturally in the physical world. It’s called the vergence-accommodation conflict (detailed below), and Singapore-base Lemnis Technologies’ latest varifocal prototype aims to provide headset manufacturers with the software and hardware to help make it an issue of the past.