Google has prototyped an " Augmented Reality Microscope," (ARM) in conjunction with the Department of Defense, which incorporates artificial intelligence enhancements to overlay visual indicators, like heatmaps or object boundaries, in real-time. The AI additions allegedly make it easier to classify samples and identify the presence of cancer cells or pathogens. The ARM was first teased publicly in 2018 and has not been used to diagnose patients yet. Currently, 13 prototypes of the ARM exist, with significant testing still needed before it can assist everyday clinicians. However, the intention is to create a system that can be "retrofitted into existing light microscopes found in hospitals and clinics," according to Google .