The second requirement is that all interactions that occur with the objects in the virtual environment must continuously respond to the commands that the user is giving it, only allowing a very small delay (NASA, 2008).
Applications .
While virtual reality technology is often thought of as video games and online gaming, there are hundreds of other applications that are beneficial to society as a whole. Two main applications this paper will be focusing on are the use of virtual reality technology in the military and in the medical field. The first application to be discussed in depth is the use of virtual realities in the military. Virtual realities have recently been adopted by the military (including the army, navy, and air force) for training purposes (Virtual Reality, 2009). According to Virtual Reality, a website all about virtual reality and its uses, social impacts, and issues, virtual reality technology is, "particularly useful for training soldiers for combat situations or other dangerous settings where they have to learn how to react in an appropriate manner," (Virtual Reality, 2009). Using this technology in soldier training is especially important because it allows soldiers to practice combat and dangerous situations without actually being put in physical harm or danger. Other uses that the military uses virtual realities for include flight simulations, medic training, vehicle simulation, and even virtual boot camp (Virtual Reality, 2009). Another way that virtual realities are used in the military, outside of combat practice, is its use to treat post-traumatic stress disorder. The idea behind this method is that soldiers who are suffering from this disorder have the chance to deal with their symptoms in a, "safe," environment where they are exposed to the triggers of their disorder and are able to adjust to them and work through their issues (Virtual Reality, 2009).