09/03/2026
In this video we talk with Dr. Johan Snauwaert, a seasoned dermatologist and Treasurer of the European Society for Lasers and Energy Based Devices (ESLD). Dr. Snauwaert graduated from the Medical School at the University of Leuven in 1982 and became board certified in dermatology in 1986. He completed advanced training in laser medicine, including work under Prof. Michael Landthaler, and has since lectured internationally, contributed to European standards on aesthetic medicine, and published widely in his field. He also serves as Deputy Editor and peer reviewer for a number of scientific journals.
In our conversation Johan takes us back to the fundamentals of laser dermatology by discussing selective photothermolysis — the core principle that makes modern laser treatments precise and effective. Selective photothermolysis refers to the targeted destruction of specific structures in the skin by choosing the right light wavelength, pulse duration, and energy so that only the intended chromophore (such as melanin in hair follicles or hemoglobin in blood vessels) absorbs the laser energy and converts it into heat, while surrounding tissue remains largely unaffected.
This principle underpins everything from hair removal to pigment and vascular lesion treatments: by matching laser parameters to the optical and thermal properties of the target, clinicians can create controlled thermal damage confined to the structure of interest, minimizing collateral effects and maximizing safety and outcomes.
Watch the full video to hear Johan’s perspective on how this elegant scientific concept shaped his clinical approach and why understanding selective photothermolysis remains essential for anyone working with medical lasers.
