Laser Toning removes or lightens the appearance of melasma as melanin and melanosomes in the skin are selectively destroyed by the laser energy. The clinical benefit has been proven over recent years in all different types of skin, and it is now even more effective with the new treatment mode of Spectra XT using its double-purse technology.
Melanocyte in melasma patient has many dendrites and stretches from the basal layer up towards the granular layer.
The 3D structure of the melanocyte with fewer dendrites is seen after Laser Toning treatment. This melanocyte is still alive, but its capability to pass melanin into the keratinocytes (skin cells) have been dramatically decreased.
"A low fluence Q-switched Nd:YAG laser modifies the 3D structure of melanocyte and ultrastructure of melanosome by subcellular-selective photothermolysis"