Over the past 25 years (since Microlight got the first FDA clearance for a therapy laser), HP laser therapy has exploded with many practitioners like chiropractors, acupuncturists, and physical therapists. It has also seen significant growth in use by veterinarians for treating horses and companion pets. These professionals are typically trying to heal the root cause of the problems versus treating the symptoms of the problem. To do this, many have been using low level lasers or high power intensity laser therapy in conjunction with their other treatment modalities. Class III Lasers are called Low Level Lasers.