@chuuuukie why do they need psychological evaluation exactly? The virtual reality is used to "distract" the patient's attention from their pain and thus in some ways alleviate their pains. It is ideal to be used in intermittent pains but never advisable for those that involves intense ones like those in cancer or angina(chest pains) or migrains.In fact the added visual stimulation might even possibly exacerbate the current condition.