Often called EVLT™ (endovenous LASER treatment), this technique received FDA approval in 2002 and utilizes a small fiber placed inside the vein to deliver LASER light inside the vein.  The light striking the vein wall and blood inside the vein creates heat whcih seals the vein shut. This technique is similar to the radiofrequency technique except that the LASER provides the source of heat rather than the Venefit™ catheter. A number of LASER wavelengths and fiber designs are used and results are similar to those with the radiofrequency catheter.