Laser is an acronym for light Amplification by Stimulated Emission of Radiation. Several decades ago, the laser was considered like a death ray, the ultimate weapon of destruction, something you would only find in a science fiction story. Then, lasers were developed and actually used, among other places, in light shows. The beam sparkled; it showed pure, vibrant and intense colors. Today the laser is used in the scanners at the grocery store, in compact disc players, as a pointer for lectures and above all in the medical and dental field. The perception of lasers has moved from the comical death ray to the more useful ray for development of health sciences