The application of laser and monochromatic light sources at relatively low (i.e. essentially athermic) incident powers and energies to stimulate wound repair and to alleviate pain has been advocated for over three decades. Such therapeutic use is variously termed Low Level Laser Therapy (LLLT), Cold Laser Therapy or Low Intensity Laser Therapy (LILT), and represents a popular treatment modality in a number of countries, including the UK and Ireland. Despite such popularity, experience with the modality in the USA has been limited, principally due to the lack of FDA approval for such devices, at least until relatively recently.
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