Surgical ligation and stripping has long been the gold standard in the treatment of great saphenous vein (GSV) insufficiency, which leads to varicose veins. During the past several years, endovenous catheters that deliver destructive heat to the vein wall have challenged the surgical alternative. Radiofrequency ablation or endovenous laser ablation (EVL) has become the preferential treatment option for thermal ablation of the refluxing GSV. Lasers designed for the destruction of the vein wall can be classified into hemoglobin-specific laser wavelengths (HSLWs) and