4.2: Introduction

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It has been shown through many studies that Brain-Computer Interaction (BMI) systems and Augmented Reality (AR) systems can help users with disabilities. Also, they provide a new level of technologies to create smart environments. In this brief review, Augmented Reality concept restricted to particular display technologies which are mostly used in experimental designs. AR and BCI systems spread to various fields. For example doctors can use the AR system by using Head Mounted Display (HMD) to gather real-time medical data from the patient’s body (Bichlmeier, Wimmer, Heining, & Navab, 2007), on the other hand in our homes we can control electronic devices, lights with hand gestures, gaze movement and voice commands (“Microsoft, HoloLens” n.d ). Additionally, users can create holograms which allow them to visualize and work with their digital contents, users can interact with the virtually display objects or holograms. AR and tracking technologies improve the environment we engage in by using different sensors and various electronic devices, some examples of past and current BCI and AR studies and applications provided in this review.