PHOTO-DEPILATION (hair removal HR)

for photo-depilation the chosen filtration specially targets the melanin while preserving the oxyhaemoglobin. It is of course the melanin of the hair that is the target, even if the skin absorbs part of the light rays. The hair removal is said to be permanent because the treatment destroys the cells responsible for the hair growth. These cells are present at the level of the bulb, the dermal papilla, the germinal matrix and the bulge; the hair actually serves as a driver of energy to these cells by molecule to molecule transmission. The quality of the hair as a conductor is essential; the hair must be in the anagen phase and contain a sufficient quantity of melanin.

The reason for the train of pulses that equip the DERMEO devices is to warm the hair sufficiently (>70°C) whilst preserving the surrounding tissue. The skin especially, is preserved by repeating pulses of light with timed intervals which take into account the thermal relaxation time of the skin compared to the target chromophore.

Pulsed light devices transform electrical energy into bursts of intense rays of light through the use of a lamp containing a nable gas, Xenon. The rays of light from the flash are of strong intensity and cover a spectrum of wavelength corresponding to both visible light and the beginning of the infrared spectrum. Different filtrations are available depending on the targeted chromophore (oxyhaemoglobin, melanin, water or porphyrin).

PHOTO-REJUVENATION (skin rejuvenation SR)

Cumulated exposure to the sun, cigarettes, general pollution and the aging of the skin cause the denaturation of the structural components. This creates one of two types of pigmentosis:

  • “Brown spots” due to the melanin which is diffused and/or concentrated in more or less dense markings

  • “Red type” due to haemoglobin present in vascular lesions. 

According to the skin phototype, a predisposition to one of these lesions may be noted, but in general a mixture of the two markings are treated on the face, neck, shoulders and hands.


The pulsed light action on evolutive acne is based on the heating of the porphyrin produced by the bacteria Propionibacterium acnes which cause the destruction of the cell membrane. The pulsed light treatment is generally indicated for retentional acne or for inflammatory acne of either medium or minor severity.


The chosen filtration allows excellent absorption of light rays by oxyhaemoglobin, the chromophore targeted in the treatment of vascular lesions. The pulsed light acts by rupturing the vascular wall and incorporates the principles of selective photothermolysis. Pulsed light is particularly effective in superficial vascular lesions such as rosacea, fine telangiectasis and diffused redness etc.