'Tactile feedback' place in the field of medicine that is used a lot. On a computer screen and watch the virtual 3-dimensional anatomical structure of the patient directly to the affected part of the 3-D video in real-time sisulhal a notice on your computer screen. And the compressed air and electrical machinery, such as moving suyonggi using a small pin and, in fact, feels like touching the skin and is passed to implement the reality of the situation is almost similar to the environment.