Products Description Treatment principle: Rox Anderson and John Parrish, 'the principle of selective photothermolysis', the shorter the laser action time, the target tissue to absorb the accumulation of laser energy is less likely to spread to the surrounding tissue, the energy was limited extent In the target treatment needs to protect the surrounding normal tissue, so the treatment of the stronger the selectivity. Picosecond laser pulse width is only one hundredth of the traditional Q-switched nanosecond laser, its excellent performance to ensure that picosecond laser pulse crushing of pigment particles more thoroughly, while the surrounding tissue damage