# Extended Reality: Types and Applications
## 3 Applications of Extended Reality
### Extended Reality and Its Usage
#### 3.1.1 Virtual Reality and Its Usage  
Virtual reality tools allow technical visualization of the processes in 3D space, so it can be implemented in different areas--from showing visualization in a virtual room from a regular monitor to a virtual world with interaction using a helmet with spatial controllers [15]. Provided below are some examples of the use of virtual reality systems in different application areas. * Education--A virtual workspace is especially useful because the user can see and interact intuitively. VR is used to create a virtual classroom, an environment for a better feeling of the subject [16]. Gamification of educational material using VR  
Figure 1: Extended reality types. Adapted from [13]. engages students, which leads to improved perception and learning of subjects [17]. For example, these include visual demonstration of various processes in biology, chemistry, and technical subjects; virtual presence in important historical events; interactive travel to any corner of the earth when studying geography; or the study of astronomy with visualizations of solar systems and other planetary systems [2]. The implementation of VR makes lessons more exciting and memorable using step-by-step methods without leaving the classroom [18]. Students can see and interact with virtual objects and conduct modeling experiments in virtual laboratories [19]. This can save money on equipment and consumables and allow for safe experimentation. In the professional field, VR is used for visual safety training in various industries such as construction, fire safety, aviation, and mining. This type of visualization leads to an improved understanding and feeling of safety measures [20]. * Medicine--VR can also be used for professional purposes. In medicine, it accounts for 81% of other XR technologies [21]. These systems are often used in medicine to train doctors and visualize the patient's anatomical features when preparing and planning an operation based on the 3D models created from magnetic resonance imaging (MRI) and computed tomography (CT) scans. VR simulators are used to simulate operations and train surgeons without risk to patients and after showing the latter to the public during the educational process. Thus, future doctors can safely study anatomy, physiology, and complex medical procedures in an interactive 3D environment. Such solutions make the educational process more visual and interactive [22]. Virtual reality is used in robotic surgery, which increases the accuracy of the operation and allows it to be carried out remotely, for example, in remote areas or in the case of an urgent operation [23]. Rehabilitation using VR makes it easier for patients to recover from surgery, as one of the options for physical therapy, replacing standard exercises with exciting tasks that encourage patients to actively take part in rehabilitation. This technology has proven itself in the treatment of mental disorders, such as the treatment of phobias and post-traumatic stress disorder [24], and is especially useful after amputation and in those who need adaptation to prostheses [25]. * Architecture and Design--Modern design almost always uses computer-aided design (CAD) systems that allow you to create structures in virtual space and perform simulations. One of these systems is called Building Information Modeling (BIM). This system is used in many architectural software packages, such as Autodesk Revit 2024 and ArchiCAD 28 [26]. The convenience of this system is that it creates a standard 3D model of the future project and allows one to show it on a computer or tablet screen, as well as using virtual reality glasses, which allows designers to virtually walk in the 3D models of buildings they have created and check them at the design stage. This simplifies the development process, making it more interactive and visual. Such visualization allows a better understanding of spaces' scale, proportions, and functionality [27].