LASER THERAPY: It is the initials of the English words Light Amplification by Stimulated Emission of Radiation.

Used since 1980 for therapeutic purposes. The first L.A.S.E.R device was called He-Ne and was used mainly in China but also in Europe in the 1960s-1970s. L.A.S.E.R diodes are divided into two categories, pulsed and continuous wavelength.