The first active laser was invented in 1960 by Theodore
Mainman. The first high-power lasers (surgical lasers), which were able to cut through the skin appeared in 1965.
In 1966, Professor Endre Mester was researching the possible adverse side effects of low-power (soft lasers). When he found out that not only do „soft-lasers” lack any adverse side effects, but on the contrary, they have a beneficial biostimulative effect on the human body.
This means that the cells and tissues, lit by soft laser light are able to heal / regenerate faster (e.g. accelerated wound healing). Laser light increases cell metabolism, even new cells, tissues and capillaries are formed.
In the late 1970s, a Hungarian research team consisting of doctors and physicists realised that the „polarisation” of laser light plays an important role in the beneficial „biostimulative” effect.
Since lasers at that time were very expensive, low-efficiency and dangerous to human eyesight, this research team created a much cheaper and eye-safe ordinary lamp, the light of which they polarised. This was the predecessor of today’s polarised lamps (e.g. Bioptron).
The success story of the next 30 years proved well, how beneficial polarised light is to the human body.
The recently developed semiconductor lasers, are much more powerful, much more efficient and cheaper than the polarised lights, however they are still dangerous to the eye.