The Army's ask of $400 million to buy about 6,900 goggles, which are based on Microsoft's HoloLens Headset, was nixed because field tests showed the headsets caused "mission-affecting physical impairments," like headaches and nausea, Bloomberg reported Thursday.The Army wrote that the new variant will address "physiological" issues identified during testing.The company "is committed to working with the Army to further develop [Integrated Visual Augmentation System] technology," a Microsoft spokesperson said in an email to CNET."The regular cadence of building and testing IVAS ... will help us refine and improve the technology to ensure it brings unparalleled protection and capabilities to America's Soldiers."For more, check out the US Army's $21.88 billion deal to produce the combat goggles, as well as CNET's hands-on review of Microsoft's HoloLens 2."