Study on Treatment of Varicose Veins by Endovenous Laser (1940 nm vs 1470 nm)

Inclusion Criteria: * Primary insufficiency of the great saphenous vein (GSV) and/or small saphenous vein (SSV) * Patient candidate for endothermic treatment of the lower limbs * CEAP: C2 - C6 * Patient with a target vein diameter (GSV and/or SSV) \>= 3 mm throughout the target vein segment * Patient affiliated or beneficiary of a social security scheme * Patient having signed the informed consent Exclusion Criteria: * Patient with a current serious pathology and/or a life expectancy of less than 5 years * Patient who has had a deep or superficial vein thrombosis in the previous 6 months * Obliterating arteriopathy of the lower limb concerned, with an IPS \< 0.8 or \> 1.3 * Patient with post-thrombotic obstructive syndrome at the popliteal and/or femoral and/or iliac stage on the ipsilateral lower limb * Patient with primary or post-thrombotic axial deep venous reflux on the ipsilateral lower limb * Suspicion of non-post-thrombotic iliac compression on echo-doppler * Contraindication to the planned treatment technique * Patient whose geographical distance is not compatible with the follow-up of the study * Pregnant or breastfeeding women * Patient linguistically or psychologically unable to understand the information given, to give informed consent or to answer the study questionnaires. * Protected patients: Adults under guardianship, or other legal protection; Hospitalized without consent.