Medical augmented reality is a transformative technology in healthcare that overlays digital information or imagery onto a surgeon's view during medical procedures. This technology assists surgeons in visualising critical data, such as 3D reconstructions of anatomy or real-time patient data, directly within their field of view. Medical AR enhances precision, improves decision-making, and contributes to better patient outcomes. Applications include surgical navigation, medical training, and patient education. By providing surgeons with augmented insights and guidance, medical AR is revolutionising the way complex procedures are performed.